macOS 27 public release includes AI model downloads that can consume significant storage. The community has identified two verified workarounds to prevent these downloads.

First, disable Siri and set a language that doesn't match your system or isn't supported. Second, enable Low Data Mode in System Settings, though this may block macOS updates and cause syncing issues.

After applying one workaround, users can remove existing AI models by booting into recovery mode, mounting the Data partition in Disk Utility, and running terminal commands in the Assets V2 directory. The process removes com_apple_Mobile Asset_UAF_FM files and incomplete downloads safely without disabling SIP.

The workaround is reversible—reverting the setting re-enables AI features. Users are encouraged to submit feedback to Apple via Feedback Assistant requesting opt-in AI functionality.