Apple hates Linux

New Apple T2-enabled hardware no longer allows Linux to be used.

https://fossbytes.com/apple-t2-security-chip-blocking-linux-booting-new-macs/

http://infosurhoy.com/cocoon/saii/xhtml/en_GB/technology/apple-t2-safety-chip-removes-linux-assist-from-some-newer-macs-update/

https://www.theregister.co.uk/2018/11/06/apple_mac_linux_woes/

Apple’s new T2 chip keeps Linux off the MacBook Air and Mac mini 2018