macOS 27 quietly removed the one switch that let you turn Apple Intelligence off. You can still toggle individual features in System Settings, but the on-device AI models stay on your drive, taking up gigabytes whether you use them or not. Over the weekend, an indie developer decided that was not good enough and released a free tool that does the job properly.
It is called RemoveMacAI, and it has blown up among Mac users for one simple reason: it reclaims the storage Apple Intelligence was sitting on, roughly 12GB by the developer’s estimate, and in some reported cases far more than that. The project is open source and MIT licensed, so anyone can read exactly what it does before running it.
How RemoveMacAI gets Apple Intelligence off your Mac
The tool works the way Apple itself would prefer tools to work, which is part of why people trust it. Instead of hacking at system files, it installs a user-approved configuration profile that uses Apple’s own restriction keys to switch off the AI features, then tells the system to delete the downloaded models through Apple’s asset service.
The clever part is how it stops the models from coming back. RemoveMacAI routes each removed model’s download address to a closed local port, so when macOS tries to fetch the models again, the fetch simply fails. System Integrity Protection stays on the whole time, and nothing under /System is modified directly. The tool even builds on pared, an earlier research utility by developer 4evy that mapped the asset service endpoints, packaged here as a signed binary whose build provenance can be verified.
Installation is through a curl script or Homebrew. Run it and the tool first shows you what is currently on, asks for confirmation, then opens System Settings so you can approve the configuration profile yourself. A dry-run mode previews the changes, and a flag lets you keep specific features if you only want some of the AI gone. There is also a removemacai status command that lists the individual models and how much storage each is using, so you can see the actual space being taken before you remove anything. And the whole thing is reversible, with a revert command that restores everything.
Everything that goes quiet when the models leave
The list of what gets switched off is long, which tells you how deeply Apple Intelligence is now woven into macOS. Siri goes, including “Hey Siri” and the menu bar icon. So do Writing Tools, Genmoji, Image Playground, and the ChatGPT extension. Summaries disappear from Mail, Messages, Safari, Notes, and notifications. Mail smart replies, inline text predictions, Spatial Photos, Photos Clean Up, and Xcode’s predictive code completion all stop too.
Beyond the visible features, apps that call Apple’s Foundation Models framework lose that ability, as does the Use Model action in Shortcuts. Visual Intelligence and natural-language editing in Calendar go as well. Dictation keeps working, because it runs on separate speech models that the tool leaves alone. One quirk the developer notes: a process named Siri will still show up in your process list, because in macOS 27 the Spotlight window runs under that name.
That is worth knowing if you rely on any of this. Developers building on Apple’s on-device models, in particular, should think twice, a point 9to5Mac also made in its coverage. This is not a free lunch. It is a trade, and the price is every AI feature Apple has spent two years adding.
The storage math: 12GB on paper, up to 35GB in practice
The developer puts the core Apple Intelligence footprint at about 12GB. Apple’s own figures line up: the company says its latest models can require up to 14GB on newer Macs. But some users are reporting much larger numbers. One MacBook Air owner documented 35.05GB of freed storage, and MacRumors previously reported cases of Apple Intelligence taking up more than 30GB on macOS 27.
The gap is easy to explain. The 12GB figure covers the foundation models. Once image generation, Genmoji, Spatial Photos, Photos Clean Up, and Xcode completion models are all downloaded, the total climbs. On a 256GB Mac with non-upgradeable storage, which is most of the MacBooks Apple sells, that difference is the line between comfortable and constantly juggling files.
Enterprise IT departments are paying attention for the same reason. Fleets of hundreds of Macs each carrying tens of gigabytes of models nobody asked for add up to real money in storage and management overhead, and a single command that standardizes the removal is exactly what fleet managers want.
What to do if you want your gigabytes back
If the trade sounds worth it, the process is short. Install the tool, run removemacai status to see what the models are costing you, then run it without arguments, review what it plans to change, confirm, and approve the configuration profile in System Settings when it opens. Your Mac reboots nothing, SIP stays on, and the space is yours.
If you change your mind, remove the profile and run the revert command, and macOS re-downloads the models when a feature explicitly requests them. The developer is clear that the tool only blocks the automatic downloads, not a deliberate re-enable.
The bigger story here is the demand itself. Apple removed the master off switch in macOS 27, presumably because it wants Apple Intelligence to feel like part of the furniture. Users responded by building their own switch in a weekend. That is a signal worth watching, the same way this site’s earlier look at Apple tightening macOS Full Disk Access because of AI agents showed the company wrestling with what always-on AI means for user control. When the AI on your computer takes up storage you cannot easily reclaim, “off” should be a real option, not a scavenger hunt through a dozen settings panes.
The AI storage squeeze is not a Mac-only problem, either. On the newest iPhones, Apple’s support documents say Apple Intelligence can now require up to 14GB of free space under iOS 27, nearly double what older models need. The models are getting bigger everywhere, which makes tools like this one, and the storage habits around them, worth learning.
