_Originally created by @sajolida on [#16410 (Redmine)](https://public-redmine-archive.tails.boum.org/code/issues/16410)_ It could prevent from starting on an external media: <https://support.apple.com/en-us/HT208198> <https://support.apple.com/en-us/HT208198> The following error message was reported to us (in French): « Les réglages de sécurité ne permettent pas à ce Mac d’utiliser un disque de démarrage externe. » This should affect by default, as per <https://support.apple.com/en-us/HT208862>: - iMac Pro - Mac mini models introduced in 2018 - MacBook Air models introduced in 2018 - MacBook Pro models introduced in 2018 It would be good to: - Have our help desk confirm that this is really happening on such machines by default - Test one of these machines: - What’s happening by default? - Does allowing booting from external media works? - Include this in our installation instructions for macOS Feature Branch: doc/17492-secure-boot:53336bc6e2 Parent Task: tails/tails#17492 ### Related issues