Apple forbade to put Linux on some of their computers.
New Apple devices with the security processor Apple T2 do not support the ability to install Linux.
This chip is used in the iMac Pro and the new Mac Mini, MacBook Air and MacBook Pro 2018 release, writes the online edition of the Chronicle.info with reference to nv.ua.
The new chip “provides a Foundation for encrypted storage APFS, secure boot and touch ID on a Mac.” However, one of the caveats is that we don’t support Linux.
By default, Mac computers that support secure boot only supports content from Apple. However, to increase the safety of installations of the Boot Camp also provides support for secure boot Windows. The UEFI firmware includes a copy of the certificate to the Microsoft Windows Production CA 2011, which is used for authentication downloaders Microsoft.
Thus, although the Windows operating system can be installed in a new Mac, those who want to install the new Linux distributions such as Linux Mint or Ubuntu will have to use a workaround.
Users of the website Reddit pointed out that you can disable Secure Boot on devices equipped T2, which allows you to download and install the Linux distributions. To start Linux, you must first access the tool in the boot and disable secure boot.
Adding that third-party operating system used on Apple computers not so rare. For example, Linux Creator Linus Torvalds so used my MacBook Air.