How Much Space Do Local AI Features Need on Your Mac and Chrome?

What Local AI Features Are Doing to Your Storage

Local AI storage requirements are the disk space your computer needs to download and run AI features directly on your device, such as macOS Apple Intelligence tools and Chrome on-device AI models, and knowing these requirements helps you decide whether the benefits of faster, more private AI processing are worth the gigabytes of space they occupy and how aggressively you should manage or disable them to free up disk space on a Mac or other laptops.

Think of local AI as a big set of brains living on your drive. macOS Apple Intelligence can quietly claim over 10 GB of space for its language and image models, while Chrome’s on-device AI wants about 20 GB of free space before it will download its models, even though those models only take roughly 4 GB once installed. On a 128 GB or 256 GB SSD, that’s not a small ask. If you’re bumping into storage warnings, understanding these numbers is step one before you flip any AI toggle. A quotable way to remember this: “Downloading the models that power Chrome’s on-device AI features requires approximately 20 gigabytes of available storage space”.

Deciding Whether to Enable Local AI on Chrome and macOS

Before you start deleting anything, it helps to decide what you actually need. Local AI can be useful: Chrome’s Gemini Nano features run faster and more privately when their models are stored on your machine, and macOS Apple Intelligence can power image cleanup and writing tools that work even when you’re offline. If that sounds great and you have plenty of spare space, you may want to leave things on. The real prerequisite on the Chrome side is storage and a good connection. Chrome will only try to download its on-device generative AI models if you have about 20 GB of free disk space, an unmetered data connection, and “sufficient device performance” for the job. If your system doesn’t meet those conditions, local AI might not show up at all, which is sometimes a hidden blessing if your disk is nearly full.

On macOS, enabling Apple Intelligence from System Settings adds many gigabytes of local files to your internal drive. If you don’t care about those features, you can turn Apple Intelligence off under System Settings > Apple Intelligence & Siri. That alone may stop new downloads, but the files already stored on disk can stay behind and keep using space. This is the gotcha: disabling the feature isn’t always the same as removing its footprint. So the question to ask yourself is simple: do you value local AI enough to give it 10–20 GB of your storage, or would you rather reclaim that space for apps, photos, and documents?

Step-by-Step: Free Up Disk Space on Mac and Chrome

If you’ve decided those gigabytes are better used elsewhere, you can free up disk space on your Mac and stop Chrome from downloading on-device AI models. Below is one ordered sequence that first reins in AI features at the settings level, then, for Mac power users, walks through removing local Apple Intelligence files. Follow it in order so you don’t fight against auto-downloads or leave features half-disabled.

1. Turn off Apple Intelligence in macOS: Open System Settings > Apple Intelligence & Siri and disable Apple Intelligence if you don’t need it.
2. Block Apple Intelligence tools via Screen Time: Go to System Settings > Screen Time > Content & Privacy (enable it), then open Intelligence & Siri or Siri (on macOS 27) and turn off all switches for Image Creation, Writing Tools/Writing Assistance, and Extensions.
3. Restart your Mac a couple of times so macOS can clear unneeded Apple Intelligence cache and system files; then check System Settings > General > Storage and click the info icon next to macOS to see if space has been reclaimed.
4. If large Apple Intelligence files remain, document current usage: Restart once more, go back to System Settings > General > Storage, click the info icon next to macOS, and take a screenshot or photo showing how much space Apple Intelligence is using.
5. Shut down your Mac and wait about a minute, then enter recovery mode by pressing and holding the power button until you see “Loading Startup Options” on the screen.
6. Click Options, then Continue, select your Mac’s primary volume, and click Next; choose your user, enter your password, and continue to the recovery screen.
7. Open Disk Utility, expand your Mac’s volume, select the Data partition, and click Mount; unlock it with your user password, then quit Disk Utility from the menu bar.
8. Open Terminal from the Utilities menu and carefully run the following command to remove text generative models: rm -rf /Volumes/Data/System/Library/AssetsV2/com_apple_MobileAsset_UAF_FM_GenerativeModels.
9. Run a second command to remove image-related AI assets: rm -rf /Volumes/Data/System/Library/AssetsV2/com_apple_MobileAsset_UAF_FM_Visual.
10. Restart your Mac, turn off Wi-Fi or unplug Ethernet immediately, then check System Settings > General > Storage > macOS (info icon) to confirm Apple Intelligence no longer takes up significant space.
11. On Chrome, open Settings > System and toggle off On-device AI; this removes local AI models and prevents them from being re-installed in the future.

When you finish these steps, you should see Apple Intelligence usage drop dramatically or disappear in macOS storage reports, and Chrome will stop using and reinstalling its local AI models once the On-device AI toggle is off. The big warning: if you reconnect your Mac to Wi‑Fi, it may download Apple Intelligence files again even with the feature disabled. For Chrome, manually deleting the AI files without turning off On-device AI will not stop future downloads. Always change the settings first so the system isn’t fighting you. This is a serious, low-level process on Mac. If you’re not comfortable with recovery mode and Terminal, you may prefer to stick to the earlier settings-only steps or consider a clean system reset after backing up your data.

Common Gotchas and How to Keep Space Free Long-Term

Two mistakes keep biting people. The first is believing that turning off Apple Intelligence once means its files are gone forever. Even after you disable the feature and its tools in Screen Time, macOS can download those gigabytes of models again over Wi‑Fi, sometimes bringing usage back above 14 GB despite the feature being off. The second is attacking Chrome’s AI files directly: deleting the weights file manually doesn’t disable the feature or stop future downloads.

To avoid those loops, always start with settings. On macOS, block Apple Intelligence and its tools as described, then restart and watch storage over a few days. On Chrome, treat the On-device AI toggle as your master switch: turning it off not only uninstalls local models but also prevents them from being re-installed later. When storage is tight, pair this with broader cleanup tactics and keep an eye on System Settings > General > Storage, where Apple Intelligence usage is clearly listed with the macOS entry. Long-term, the goal is balance. Use local AI where it genuinely helps you, but be ready to turn it off or clear its files when your SSD starts to feel cramped.