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Can Wi-Fi and Bluetooth power output be reduced by Apple software?

MacBook/iPhone :: I would like to reduce power used in WiFi and Bluetooth to minimum acceptable for adequate performance(define) for health reasons. I am seated close(15 ft) to router(5G AT&T etc . . . It would be nice if Apple sofware monitors performance and lowers power radiated to human to minimum needed. EMF radiation is a MAJOR health issue.

39 replies

You can connect your MacBook Pro 16-in using an Ethernet cable and turn WiFi and Bluetooth OFF.


USB-C to Ethernet adapter WAS available at Apple online store, but currently out of stock, but available many other places.


belkin-usb-c-to-2.5G-ethernet-adapter



if USB-C ports are in short supply, they also sell this version with a pass-through charging port:


Belkin Connect USB-C to Gigabit Ethernet & 100W Charging Adapter


or you could buy a docking station that includes an ethernet port.


Side effects of no Wi-Fi:

• your exact location will be harder to determine.

• message notifications and other activities that use Wi-Fi locally may be somewhat less responsive

• no Wi-Fi phone calls

• no moving files from iPhone to Mac without a cable



In regards to your original post, you specifically mentioned your router and how nice it would be if Apple software could lower its power output. Your router is transmitting EMF whether you have your Mac connected or if the Mac is completely powered off, so what are you expecting Apple to do about your router. For concerns about EMF levels, a 5G wireless router is the worst you could get.


Follow the tips offered by others, and even in your own post to reduce your EMF:

  • Turn Wifi off on your Mac.
  • Choose an Ethernet only wired router.
  • Turn off Bluetooth on your Mac.
  • Use cabled connections to accessories like printers instead of wireless.
  • Use a laptop on a desk and not actually on your lap.
  • Don't place a phone in your pocket and if really concerned don't even put it to your ear.
  • Assuming your day does not revolve around computer/phone use, consider other sources of EMF in your environment and mitigation, such as Power Lines, Cell Tower, Microwaves, Refrigerators, Electric Blankets, Hair Dryers, TV's, and even the Sun.
  • Don't use a smart watch
  • Don't use Earbuds
  • Don't use a cordless home phone


No need to debate the different studies with widely different conclusions or include AI responses that vary dramatically based on the semantics of the question asked and the data they are trained on. Simply take whatever action you feel is appropriate.

manoappa wrote:
MacBook/iPhone :: I would like to reduce power used in WiFi and Bluetooth to minimum acceptable for adequate performance(define) for health reasons. I am seated close(15 ft) to router(5G AT&T etc . . . It would be nice if Apple sofware monitors performance and lowers power radiated to human to minimum needed. EMF radiation is a MAJOR health issue.

Most routers can have their output RF power reduced via the router management tool, often an iPhone utility or via a web browser.


Routers and computers WiFi are constrained to about 20 dBm, which is about 100 milliwatt, as per FCC requirements. At this level, non-ionizing radiation is used, which at such a lower power level cannot break chemical bonds, affect DNA, or change cells. Furthermore, just 3 feet away, the power received drops even more, by at least 30 dB (factor of 1000x) reducing the received RF power from the router down to less than 1 microwatt. You are 15 feet away. (BlueTooth levels are even lower power.)


In contrast, a cell phone can transmit as much as 1000 milliwatts or more, and those are often much closer to people, in their hands, near their heads, in a pocket, etc.


I agree EMF can be a concern, but not at the levels near a router or a Mac. Those levels are so low as to cause heating of living cells that is lower than a level that can be measured. Hence the FCC limit, to keep it at those levels. Extended cell phone use could be a much larger concern.

How about WiFi and Bluetooth OFF on both your Router and your Mac (and your phone as well, if you prefer).


Connect Macs with Ethernet instead.


Turn WiFi and Bluetooth OFF on your Router AND your Mac.


Connect your phone ONLY with cellular, if that is your preference.

Apple doesn't do that. They are only interested in standards compliance, which all their products meet, obviously, otherwise they wouldn't be permitted to sell them.


If you are EMF sensitive then you probably would want to stay far away from any source of such radiation. There is no place anywhere on Earth or above where it can be completely avoided, only minimized.


Likewise, you are unlikely to find any advocacy groups, lobbyists, watchdog agencies etc actively seeking to minimize or eliminate EMF radiation. You will find few if any peer-reviewed studies, since they require funding. Lots of it. Who will provide it? Even if there were to be any, the handful of enormous conglomerates that ultimately control the world will quash them. Memoryholed. It's happened already, recently, and will continue to happen.


Money makes the world go 'round, and you don't have enough to compete with that. No judgement, just stating the facts.

That is a journey you will have to take on your own. Start with your Government that provides the standards for acceptable EMF/SAR that electrical devices must comply with. For cell phones I believe that SAR limit is 1.6 W/kg averaged over 1 gram of tissue. Certainly feel free to use the Feedback link to Apple that has already been provided.


For mitigating your exposure, use the suggestions already provided. If you are looking to start a campaign as a consumer advocate, then you will have to look for another avenue. A book may be a good approach or you may have some other ideas as well. Social Media is always a popular choice to reach a large number of people without committing too much money.

IdrisSeabright wrote:
I would point out that if you go outside during the daytime, there is a giant fiery ball in the sky that exposes you to about 4000 times as much EMF radiation as a cell phone. The EU considers it a Group 1 carcinogen. I'm surprised they haven't banned it yet.

And Apple is familiar with designing battery-powered portable devices, and undoubtedly disinclined to run the radios at higher than the wattage necessary for stable operations. More watts, more heat, more battery usage.

Looking for Apple and manufacturers to mitigate risk . . . . . design safer . . .


Continuing to post in a user-to-user forum won't make that happen. Apple are not here. Please use the feedback links already provided you want Apple to see your concern.



Your Router provides store-and-forward messages between all devices connected to your network, whatever way they connect.


These devices can be connected at different speeds, different Wi-Fi bands, and different media, including ether-net. Everything still works as if directly connected. The Network Switch function of your Router provides this service locally, without having to send your data to the internet.


If your Printer has an Ethernet port, it can be connected using ethernet as well.



I would point out that if you go outside during the daytime, there is a giant fiery ball in the sky that exposes you to about 4000 times as much EMF radiation as a cell phone. The EU considers it a Group 1 carcinogen. I'm surprised they haven't banned it yet.

manoappa wrote:
See
Request for Information on Electromagnetic Fields (EMFs), Radiofrequency (RF) Radiation, and Wireless Radiation Exposure
A Notice by the Health and Human Services Department on 09/21/2026

There is nothing in that link about EMF or RF Radiation. The subject has been studied many times over the past 40 years, and there has not been a single study that found any harmful effects at the frequencies and power levels used by mobile personal devices.


If you are really concerned you should not use any smartphone (or dumb phone) at all, and should not live anywhere that has cell service at all, or other emergency services.

Wi-Fi and Bluetooth are irrelevant. Your phone connects to the cellular network at roughly 10 times the power level used by Wi-Fi and 50 times the power level used by Bluetooth. And at much higher frequencies, up in the radar bands for 5G.

I am a physicist (theoretical/experimental) so quite familiar with much of this all the way back to

Maxwell's Equations . . . .

The isuue is EMF radiation and its impact on the human. body/brain, pregnant mothers etc.

Recent studies show that cancer(many kinds) is triggered by EMF radiation . .

so reducing the radiation is very important

Why radiate more than needed ?


Looking for Apple and manufacturers to mitigate risk . . . . . design safer . . .


Unsafe at Any Speed: The Designed-In Dangers of the American Automobile is a non-fiction book by consumer advocate Ralph Nader, first published in 1965. 

manoappa wrote:
The isuue is EMF radiation and its impact on the human. body/brain, pregnant mothers etc.
Recent studies show that cancer(many kinds) is triggered by EMF radiation . .

Have you got peer-reviewed references for those studies and do they relate to the levels put out by mobile devices? If not then you're just scaremongering.

manoappa wrote:
I am a physicist (theoretical/experimental) so quite familiar with much of this all the way back to
Maxwell's Equations . . . .
The isuue is EMF radiation and its impact on the human. body/brain, pregnant mothers etc.
Recent studies show that cancer(many kinds) is triggered by EMF radiation . .
so reducing the radiation is very important

Could you possibly link to those studies? I'd be very interested in reading them. The research is usually not done by physicists but by cancer biologists and physiologists. Though I work with cancer biologists, I'm not one, but this is a particular area of interest to me. I thought I was up on the latest research. The EU still classifies cell phones as Category 2B.

manoappa wrote:
I am a physicist (theoretical/experimental) so quite familiar with much of this all the way back to
Maxwell's Equations . . . .
The isuue is EMF radiation and its impact on the human. body/brain, pregnant mothers etc.
Recent studies show that cancer(many kinds) is triggered by EMF radiation . .
so reducing the radiation is very important
Why radiate more than needed ?

That is absolutely FALSE. Fake news. Please cite published studies that support your claim. If it were actually true we are all doomed, because we are all constantly surrounded by non-ionizing EMF radiation. Your Wi-Fi router is by far the least of your concerns if you actually believe EMF radiation is harmful because there are much stronger emissions all around you.

IdrisSeabright wrote:
Could you possibly link to those studies? I'd be very interested in reading them. The research is usually not done by physicists but by cancer biologists and physiologists. Though I work with cancer biologists, I'm not one, but this is a particular area of interest to me. I thought I was up on the latest research. The EU still classifies cell phones as Category 2B.

I am sure they must be in MedLine. If I had the time I would do a search, but I’ll wait for the response from the OP.

Lawrence Finch wrote:
I am sure they must be in MedLine. If I had the time I would do a search, but I’ll wait for the response from the OP.

PubMed is my usual site as it indexes additional content. But the search system is a bit less user-friendly, I think. It's also run by the NLM.

manoappa wrote:
I am a physicist (theoretical/experimental) so quite familiar with much of this all the way back to
Maxwell's Equations . . . .

I am familiar with Maxwell's equations (PhD in physics). 42 years experience working with spacecraft; we spend a lot of time testing for EMI/EMC; all processors in electronic devices emit this even at tiny levels.

The isuue is EMF radiation and its impact on the human. body/brain, pregnant mothers etc.
Recent studies show that cancer(many kinds) is triggered by EMF radiation . .

Recent studies -- I would like to see references for peer-reviewed published papers in respected medical journals. You have not provided any. Those studies should include statistical data (peer-reviewed by experts in the medical fields that are relevant) that relate to the levels of EMFs typically resulting from exposure to the consumer grade devices you are concerned about. You did provide a number of other general links but none of them relate to the specific issues you have brought up.

Unsafe at Any Speed: The Designed-In Dangers of the American Automobile is a non-fiction book by consumer advocate Ralph Nader, first published in 1965. 

Yes, I am familiar with that book and the work Nader did regarding the dangers of the Corvair and other automobiles. That work led to many of the safety regulations in place today for automobiles. Note that many restrictions and safety regulations are in place regarding safe and unsafe levels of exposure to radiation as well. But that Nader work is not relevant to the EMF questions you posed earlier.

so reducing the radiation is very important

I agree with not subjecting infants and pregnant women and anybody to unnecessary risks and levels of radiation. But context is important. What are those levels of electromagnetic radiation and how do they compare to other risks that have been statistically quantified and (apparently) accepted:


  • radiation from the sun (a much bigger problem I believe), and much higher levels of solar radiation exposure while at altitude in aircraft for both employees and passengers
  • ubiquitous WiFi in most places of employment, stores, public places. How much radiation exposure results from that. Noting also ubiquitous WiFi in hospitals, medical clinics, etc. where doctors and staff are seen constantly using cell phones as well as WiFi. If those levels are dangerous, why is it so heavily used in medical facilities? Those levels are all regulated by the FCC, by the way.
  • have you noticed that many refrigerators, smoke detectors, light bulbs (!), thermostats, doorbells, security systems throughout residences and businesses are all on WIFi? I just got a new dishwasher and it is on WiFi! I Have you considered the environmental levels of RF in totality from these things? And smoke detectors (required by law) contain radioactive material. There is also EMF from ordinary appliances, including refrigerators, motors in kitchen appliances, etc. We are exposed to all these things, cumulative, which is why there are safety regulations that constrain levels.
Why radiate more than needed ?

I agree with that thought. But note also that manufacturers of WiFi and devices that use WiFi face consumers that mostly complain about wanting stronger and better WiFi, not the other way around. And this is what manufacturers will respond to. Hence why we have to have those regulations to keep it under control.


In the meantime, to reduce your exposure, perhaps eliminate all WiFi devices in your home (or turn off their WiFi), turn off all BlueTooth where you can, avoid airline travel, don't use or go near anyone using cell phones, maybe avoid trains and subways as well since they all have strong WiFi, avoid businesses that have WiFi. It almost seems like a huge endeavor to even figure out where to start. Hence the importance of understanding the relative strength of the EMF from all these different sources.


For both Macs and PCs, doing all these things would largely disable their most common functions and might make them very difficult to use. But one can start with turning off or disabling the largest sources first, which requires a pretty good and documented knowledge of what those levels actually are so you know what to prioritize.

steve626 wrote:
I am familiar with Maxwell's equations (PhD in physics). 42 years experience working with spacecraft; we spend a lot of time testing for EMI/EMC; all processors in electronic devices emit this even at tiny levels.

So it IS all rocket science to you!

IdrisSeabright wrote:
So it IS all rocket science to you!

Well, physics at least. But people (apparently physicists included) worry about things that are tiny risks and seem to ignore the things that are much larger risks. You hit the nail on the head yourself, IdrisSeabright, earlier, when you pointed out that the Sun baths us in radiation at much higher levels, so maybe taking steps to minimize exposure to the Sun would be more effective in reducing health risks from electromagnetic radiation rather than focusing on WiFi signal strength.


One thing "rocket scientists" do, before a launch, is list all known risks, ranked by Likelihood and Consequence. The most significant risks are addressed in priority order, until either money runs out of time runs out and the launch date arrives. Then, a decision is made whether to launch or not, based on the residual risk.


Putting WiFi radiation exposure at a higher priority to address than many other electromagnetic radiation exposures that might be much larger does not make sense to me at all. But if the OP wants to reduce WiFi and Bluetooth radiation in the home, there are some technical approaches that have been described well to them.

steve626 wrote:
Well, physics at least. But people (apparently physicists included) worry about things that are tiny risks and seem to ignore the things that are much larger risks. You hit the nail on the head yourself, IdrisSeabright, earlier, when you pointed out that the Sun baths us in radiation at much higher levels, so maybe taking steps to minimize exposure to the Sun would be more effective in reducing health risks from electromagnetic radiation rather than focusing on WiFi signal strength.

I've read some of the research on how people evaluate risk in their everyday lives. The takeaway is that we're really bad at it. And from an evolutionary perspective, the ways in which we're bad at it make sense. Is it a tiger in the bushes? Or an aardvark? You don't lose much if you assume tiger. Compound that with the complexities of our current existence and, well, it can all be a bit much.

I did a little research. In 2025:


  • There were 112,000 cases and 8,400 deaths from Melanoma, which is caused directly by sun exposure
  • There were 5.4 million cases of non-melanoma skin cancer
  • There were no deaths from EMF
  • There were no confirmed cases of any disease caused by EMF, EXCEPT continuous exposure to high tension power lines


Brain cancer specifically:

  • Since 1990, brain cancer incidence rates have remained relatively stable.
  • Malignant Tumors: From 2008 to 2017, there was a slight decline of 0.8% annually in the incidence of malignant brain tumors.


As cell phone use became ubiquitous starting around 1990, if there was a risk from cellular radiation it would be expected that there would be a huge increase in brain cancers from people holding phones to their ears. As there has actually been a decrease in malignant brain tumors over this time period, perhaps EMF PREVENTS cancer.


However, the REAL medical issues from cell phone use come from holding devices for long periods of time, resulting in Carpal Tunnel Syndrome and other orthopedic problems, including neck injuries from looking down constantly, and pedestrian injuries from users looking at their phone rather than their surroundings.




IdrisSeabright wrote:
I've read some of the research on how people evaluate risk in their everyday lives. The takeaway is that we're really bad at it. And from an evolutionary perspective, the ways in which we're bad at it make sense. Is it a tiger in the bushes? Or an aardvark? You don't lose much if you assume tiger. Compound that with the complexities of our current existence and, well, it can all be a bit much.

My daughter's class (in high school) was assigned to write a paper on that topic, people's perception of risk versus the actual statistical risk. A great example is how people worry much more about flying in an airplane than they do about riding in a car for an hour to get to the airport. But the airplane flight risk is only a tiny fraction of the risk of that car ride. (Or probably the risk from WiFi.)


2 million people die each year in road accidents and 35,000 of those are in the U.S. The NHTSA says about 40% of car crashes result from driver inattention, a leading factor is distraction from cell phones. So I would assert that this is a far greater danger from cell phones than minuscule amounts of RF radiation.

IdrisSeabright wrote:
Lawrence Finch wrote:
There is a statue of James Clerk Maxwell in Edinburgh. This is on the back of the pediment:
Vague memories of the trauma that was college physics.

While it’s interesting that many people claim to “know” Maxwell’s Equations, few of them know how to apply them or what the mean.


AI: James Clerk Maxwell first published these equations in the 1860s, significantly advancing the understanding of electromagnetism. The modern form of these equations was later refined by Oliver Heaviside, who simplified Maxwell's original 20 equations into the four we use today.


Lawrence Finch wrote:
While it’s interesting that many people claim to “know” Maxwell’s Equations, few of them know how to apply them or what the mean.

I'm certainly not one who claims to know how to apply them!

Almost every consumer Router has at least one available Ethernet port, and your Mac can do Ethernet with an adapter.


If you can't run the Ethernet wire directly, or through the floor or ceiling, the phone company used to staple very similar wire to the top of the baseboard and around the door trims to get where it needed to go. The curved-top staples are still available as JT-25 stapler and staples.

The Poynting vector, which defines EM power passing through an area, is more relevant to the OP's concerns than Maxwell's equations.


Fun facts about Maxwell's equations.

  • If magnetic monopoles existed then the equations would be symmetrical in E and B (electric and magnetic fields).
  • The fact you can derive the speed of light from them and they show that it's a constant (dependent only on permittivity and permeability, which are physical constants) is partially responsible for Einstein's discovering special relativity.





Zurarczurx wrote:
The Poynting vector, which defines EM power passing through an area, is more relevant to the OP's concerns than Maxwell's equations.

It was the OP who brought up Maxwell's equations. Everyone else just ran with it.


Grant Bennet-Alder wrote:
Almost every consumer Router has at least one available Ethernet port, and your Mac can do Ethernet with an adapter.
If you can't run the Ethernet wire directly, or through the floor or ceiling, the phone company used to staple very similar wire to the top of the baseboard and around the door trims to get where it needed to go. The curved-top staples are still available as JT-25 stapler and staples.


The available fiber-optic wiring is so fine it’s nearly invisible when run along baseboards and trim, though it does need readily-available adapters for each end.

As for the router, I know our old model that we have from CenturyLink has adjustable signal power. You adjust that when signed into the router.


See

Request for Information on Electromagnetic Fields (EMFs), Radiofrequency (RF) Radiation, and Wireless Radiation Exposure

A Notice by the Health and Human Services Department on 09/21/2026

Thank you. Looking to lower radiated power to lowest compatible with acceptable performance.


There is a statue of James Clerk Maxwell in Edinburgh. This is on the back of the pediment:


Lawrence Finch wrote:
There is a statue of James Clerk Maxwell in Edinburgh. This is on the back of the pediment:

Vague memories of the trauma that was college physics.

re: this Discussion

Thank you. I will do that next.