When a Mac running macOS 27 connects to the internet for the first time after installation, the operating system silently pulls a multi‑gigabyte AI model onto the machine. Apple’s support documents state that the most advanced Apple Intelligence features require up to 14 GB of storage on Macs with an M3 chip or later and at least 12 GB of unified memory, and up to 8 GB on other compatible Macs.

Early adopters, however, have reported storage allocations that far exceed those limits. MacRumors documented 20.67 GB assigned to Apple Intelligence on an M4 Pro Mac mini, while Ars Technica measured 22.42 GB on an M3 MacBook Air after a fresh install of the macOS 27.0 beta 7. Both devices run Apple’s AFM 3 Core Advanced model, which officially requires an M3‑or‑newer Mac with 12 GB of RAM.

The discrepancy is not limited to high‑end hardware. Ars Technica also observed roughly 14 GB of Apple Intelligence storage on an M1 MacBook Air and a MacBook Neo—models for which Apple lists a maximum of 8 GB. Reddit users have posted screenshots showing even larger footprints, such as 30.16 GB on a release‑candidate build and 24.35 GB on a MacBook Pro with an M3 Pro chip.

Apple’s documentation does not clarify whether the “up to 14 GB” figure refers to the same storage category shown in System Settings, nor does it explain why some Macs report substantially higher usage. The company has removed the toggle that previously allowed users to disable Apple Intelligence, making the download of the on‑device model mandatory regardless of the device’s storage capacity.

The forced allocation has practical implications for users, especially as memory and storage costs rise in the AI era. While Apple Intelligence remains optional to use, the required on‑device model cannot be avoided, meaning users must set aside significant space simply to keep the operating system functional. So far, similar storage bloat has not been observed on iPhones or iPads running iOS 27 or iPadOS 27.

Analysts note that the move underscores Apple’s strategy of embedding AI capabilities deeply into its ecosystem, but it also raises concerns about transparency and user control. Until Apple provides clearer guidance or a way to manage the model’s footprint, Mac owners may need to factor the unexpected storage demand into their upgrade decisions.