macOS 27
macOS 27 for Mac notch developers
If you are extending NotNotch, macOS 27 is a host surface or a documented constraint. NotNotch keeps a macOS 14 deployment floor and is intended to run on macOS 27 without raising the minimum to 27.
Last updated 2027-07-23
Host rules
Packages declare placements in manifest.json. macOS 27 may be openTab, liveActivity, or a first-party module.
Do not disable library validation
Unsigned third-party binaries stay manifest-only. That is intentional.