User level: Level 1 (4 points)After updating iOS 27 in MacBook Air M3 the storage display information jn the system is fluctuating Siri AI is not properly responding.
Posted on Sep 16, 2026 11:33 PM
User level: Level 10 (123,805 points)Sep 30, 2026 1:22 AM in response to ravilla240
On your 13-inch MacBook Air with M3 running macOS 27.0, you are seeing two issues since the update: the storage information in System Settings is fluctuating, and Siri AI is not responding properly.
At this point, it makes sense to treat them as separate issues.
In System Settings >> General >> Storage, individual storage categories can change as macOS recalculates how space is being used.
Apple explains that System Data includes things such as caches, logs, virtual-memory files, temporary files, and other system resources, so its size can change with the current state of the Mac.
A fluctuating System Data figure, by itself, does not mean that your storage is being lost.
The more important figure to watch is Available storage and whether it is actually decreasing and staying lower. (support.apple.com)
Siri AI is a beta feature in macOS 27.
Your M3 MacBook Air meets the Apple-silicon requirement, but Siri AI availability also depends on Apple's supported language and region requirements and the rollout of the feature.
Siri also requires an Internet connection. (support.apple.com)
I would start by restarting the Mac and then checking System Settings >> General >> Storage again, paying more attention to Available storage than to any single category.
For Siri, go to System Settings >> Siri and check whether Try Siri AI (Beta) is available and enabled.
If it is enabled but Siri still is not responding properly, that points more specifically to a Siri issue rather than something we should assume is connected to the storage fluctuation.
Apple's relevant guidance is available here: Get started with Siri AI on Mac.
User level: Level 10 (211,627 points)Sep 17, 2026 12:05 AM in response to ravilla240
“After updating iOS 27 in MacBook Air M3 the storage display information jn the system is fluctuating Siri AI is not properly responding.“
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macOS 27 GUI Issues and Siri AI Issues:
Having just installed this, I’d say you need to report this to Apple Support.
Restore from a Time Machine Backup:
Did you create a Time Machine Backup prior to upgrading? If so, back it up, once more, and then restore from the previous backup. If not, then report it to Apple, and take this as a learning experience, knowing to always create a Time Machine Backup of your Mac prior to making an changes to it, from updates and software installs. That way, you can have something to recover** your Mac from should anything go wrong afterwards.
Report this to Apple:
Do your Part: Inform Apple of your feedback of this issue. Include how you’ve troubleshot this, and your results. Apple wont get back to you directly, but the more feedback they receive from its users, the more likely they will know what needs to be fixed, and what their customers prefer in updates, and future macOS versions to come. Apple with know nothing of this occurrence, if you don't report it to them.
User level: Level 1 (8 points)Sep 29, 2026 11:01 PM in response to ravilla240
MacOS 27 and even the Update MacOS27.0.1 are not stable. I can't switch between applications as it stays on same application. You must try multiple times to try to switch between different applications.
The menu bar the bottom does not appear even if you move the mouse scroll, it stays hidden
Sometimes with in any application like google meet in a browser the menu does not hide the buttons of google meet can't be accessed as the menu is stuck above them then you must resize your browser from full screen to small screen to access google meet control buttons.
Finally, it is draining the battery. The battery time has gone dead low.
Don't upgrade to OS 27, it is horrible.
Originally posted at discussions.apple.com/thread/256358734