What Local AI Storage Is Doing to Your Mac
Local AI storage management on a Mac means understanding how features like Apple Intelligence and Chrome’s on-device AI download and keep large model files on your internal drive, then deciding whether to keep, limit, or remove those files so you can reclaim Mac storage space without breaking the tools you rely on every day.
When you switch on Apple Intelligence in Siri settings, your Mac quietly pulls down gigabytes of AI model files and saves them to local storage for tasks such as offline image cleanup. It is common to see Apple Intelligence consuming more than 10 GB, and one example shows it using 14.03 GB of space on a single Mac. At the same time, Chrome’s on-device AI features need about 20 GB of free disk space before they will even download their local generative models, which then occupy roughly 4 GB once installed. This matters a lot if you are on a 128 GB or 256 GB SSD, where those numbers represent a noticeable share of your available space.
Before you start deleting anything, the real prerequisite is to decide whether you want these on-device abilities at all. Turning off Apple Intelligence in System Settings > Apple Intelligence & Siri disables the feature for future use but does not necessarily remove its local files straight away. Likewise, Chrome warns that manually uninstalling AI-related files will not stop the browser from downloading them again; you must disable its On-device AI toggle in settings to prevent future downloads. Knowing these on-device AI requirements in advance helps you decide if you prefer fast, private local AI, or lighter, cloud-based alternatives that use less disk space.
Prepare Your Mac: Turn Off AI Features and Check Space
Before you touch any system files, you want your Mac and your browser to stop asking for new AI models. Think of this stage as closing the tap before you mop the floor: if you skip it, your Mac can quietly re-download gigabytes of AI assets over Wi‑Fi even after you have removed them.
Start on the macOS side. If you do not care about Apple Intelligence, turn it off under System Settings > Apple Intelligence & Siri. Then go to System Settings > Screen Time > Content & Privacy, enable it, and under Intelligence & Siri (or Siri on macOS 27), disable switches for tools like Image Creation, Writing Tools / Writing Assistance, and Extensions. Restart your Mac a couple of times; macOS may clear some of these local AI files on its own, much like cache or system junk.
Next, check how big the problem is. Open System Settings > General > Storage and click the info icon next to macOS to see how much space Apple Intelligence is using. Take a screenshot or photo of this number so you can confirm your local AI storage management steps are working later. In Chrome, open Settings > System and look for the On-device AI toggle; turning it off uninstalls local models and prevents them from being re-installed. This is safer than hunting for files like weights.bin by hand, which does not disable the feature or block future downloads.
Step-by-Step: Remove Local Apple Intelligence Model Files
If macOS does not reclaim the Apple Intelligence space by itself, you can remove the AI model files manually. This is the "advanced friend" part of the guide: you will work in recovery mode and the Terminal, which means you must follow each action carefully and avoid improvising. Done correctly, this will free gigabytes of Mac storage space; done carelessly, it can delete things you need.
- Restart your Mac, then check and document Apple Intelligence usage under System Settings > General > Storage > macOS (info icon) so you know your starting point.
- Shut down your Mac completely and wait about a minute to ensure it has powered off.
- Turn the Mac on into recovery mode by pressing and holding the power button until you see “Loading Startup Options” on-screen.
- On the Startup Options screen, select Options, then click Continue to enter macOS Recovery.
- When prompted, select your main macOS volume and click Next; if you have multiple installations, pick the one you use most.
- Choose a user account, click Next, enter that user’s password, and click Continue to reach the recovery tools.
- In the recovery tools window, select Disk Utility and click Continue.
- In Disk Utility, expand your Mac’s main volume, select the Data partition, and click Mount; enter your user password and then Unlock if asked.
- From the top menu bar, click Disk Utility and choose Quit Disk Utility to close it.
- In the top menu bar, click Utilities and select Terminal to open a command line window.
- Carefully type the command rm -rf /Volumes/Data/System/Library/AssetsV2/com_apple_MobileAsset_UAF_FM_GenerativeModels and press Return to remove the main Apple Intelligence generative model files.
- Then type rm -rf /Volumes/Data/System/Library/AssetsV2/com_apple_MobileAsset_UAF_FM_Visual and press Return to remove the image-related Apple Intelligence assets.
- Click the Apple menu in the corner, choose Restart, and once macOS loads, immediately turn off Wi‑Fi or unplug Ethernet, then go to System Settings > General > Storage > macOS (info icon) to confirm that Apple Intelligence no longer takes up gigabytes of space.
If you follow these steps, the Apple Intelligence entry under macOS storage should drop dramatically, often from something like 14 GB down to a negligible amount. That is the expected result. The biggest gotcha is that as soon as your Mac goes back online, it may start redownloading those Apple Intelligence files over Wi‑Fi, even if the feature is disabled in settings. To keep your gains, leave Apple Intelligence off, keep AI tools disabled under Screen Time, and be prepared that this may be a temporary fix rather than a permanent deletion until Apple offers a proper "remove AI model files" button.
Chrome’s On-Device AI Requirements and How to Turn Them Off
Local AI in Chrome is simpler to control than deep system features in macOS, but it still has storage consequences. Chrome’s on-device AI models only install when your machine has enough free space, performance, and a suitable connection; if your SSD is already tight, knowing these limits helps you decide whether to enable them at all.
The browser’s help information explains that on-device generative AI models require roughly 20 GB of available disk space before they will download. Once installed, those models use about 4 GB, while Chrome without on-device AI can sit around 1.5 GB on a Mac. You also need an unmetered data connection and "sufficient device performance" for the download to begin, though the exact performance threshold is not specified. For a small SSD, those numbers matter: you might prefer to keep that space for photos, games, or work files instead of local AI.
The good news is that Chrome gives you a direct switch. To disable local AI features, open Chrome’s settings, go to the System section, and turn off the On-device AI toggle. Doing this uninstalls the local models and prevents them from being installed again. A common mistake is to hunt down files like weights.bin and delete them manually; that does not disable the AI features or stop Chrome from downloading new models later. Treat the toggle as the master control, and use it whenever you want to free up space or rely on cloud-based AI instead of on-device processing.
Is Managing Local AI Storage Worth the Effort?
Cleaning up local AI model files is mainly about control. If you are working with a roomy drive and love offline AI tools, the storage cost may be acceptable. But on a smaller SSD, reclaiming 10–14 GB from Apple Intelligence and keeping Chrome from demanding 20 GB of free space for on-device AI can make your Mac feel less cramped.
The annoying part is that macOS may redownload Apple Intelligence files even after you have disabled the feature and removed its assets. Chrome will re-fetch AI models if you delete them manually and leave On-device AI enabled. So the takeaway is simple: use the official switches first, document your storage before and after, and treat advanced removals via recovery mode as a tool for emergencies rather than a weekly habit. With that mindset, local AI storage management becomes a practical way to keep your Mac storage space under control instead of a puzzle you have to solve again and again.
