Before Apple added T2 chips to Intel Macs, external boot disks were valuable for many users. How has that fared since?
Boot Camp
Adds details of the sequence of screens displayed at each stage, to help diagnose boot problems.
Single-diagram summary of how a modern Mac starts up in macOS 10.12 or 10.13, from pressing the Power button to running the kernel.
What boot.efi does to prepare to load and run the kernel: building the hardware device tree, handling startup key commands, and more.
How can I adjust my Apple HD 23 inch display brightness when running Windows under Boot Camp?
Trying to install Ubuntu on my Boot Camp partition crashed my iMac, and it will not now boot from its install optical disk. How can I recover it?
Friends need a specialist Windows app, but want to run it on a Mac. Is this wise or feasible?
The Eclectic Light Company 