User level: Level 1 (9 points)I have installed a lifetime (not subscription) of Microsoft Office, which is working fine...but now I cannot seem to update OS 27 on my Mac M3 desktop...I have checked storage (more than half available) but could the problem be insufficient Ram? Disabled any VPN as well. Maybe my internet?
Posted on Sep 27, 2026 9:09 AM
User level: Level 10 (123,805 points)Sep 30, 2026 2:13 AM in response to Oregon Nana
Your 24-inch M3 iMac is compatible with macOS 27, so the M3 chip itself should not be the problem.
Apple currently lists macOS 27.0.1 as the latest release. Apple — macOS 27 compatibility
Since Software Update is showing macOS 26.7 as the latest version instead of offering macOS 27, the first thing I would check is whether macOS 27 is actually being made available to your Mac.
There is no need at this stage to assume that RAM, storage, Microsoft Office, the VPN or your internet connection is responsible.
Open Applications > Utilities > Terminal, enter: softwareupdate --list-full-installers
and press Return.
This simply lists the full macOS installers currently available for your Mac; it does not install anything. Apple — How to download and install macOS
If the results include 27.0.1, we can then try downloading the full installer directly with and in Terminal:
softwareupdate --fetch-full-installer --full-installer-version 27.0.1
This downloads the full macOS installer but does not immediately upgrade your Mac.
I would wait until we see the --list-full-installers results before running this command.
If 27.0.1 is not listed, do not run the download command.
The absence of 27.x from the list would itself be useful information about why the upgrade is not being offered.
Please paste the complete Terminal output here, along with the exact wording shown under > System Settings > General > Software Update.
We can then decide whether downloading the full installer is appropriate.
User level: Level 10 (162,806 points)Sep 27, 2026 9:45 AM in response to Oregon Nana
... could the problem be insufficient Ram?
Doubtful. Even the most modestly configured M series iMac will have sufficient RAM for macOS 27.
Maybe my internet?
Maybe.
What is the exact error message or dialog, assuming there is one?
Remove the VPN by following its uninstallation instructions. Disabling them is generally insufficient, as they tend to modify network settings that can be difficult to revert even after uninstalling the VPN.
Read Don't use VPN services. "Coffee shop" VPNs have grown to supplant "anti-virus" scams.
User level: Level 1 (9 points)Sep 29, 2026 4:00 PM in response to John Galt
Upgrade search shows 26.7 as being the latest upgrade...not 27...so cannot upgrade Mac Desktop running M3 Chip??
User level: Level 10 (162,806 points)Sep 29, 2026 4:06 PM in response to Oregon Nana
User level: Level 1 (9 points)Oct 1, 2026 2:29 PM in response to Oregon Nana
Owl-53: you are my resident genius...after weeks of trying to get help (still under warranty) I followed your instructions exactly and now have Golden Gate installed...THANK YOU SO MUCH
User level: Level 10 (123,805 points)Oct 2, 2026 12:34 AM in response to Oregon Nana
You are welcome
🦉-53
Originally posted at discussions.apple.com/thread/256366002