Running older macOS, support for Intel apps and kernel extensions, booting from an external drive, Boot Camp and Windows support, cloning, and startup key combinations.
Boot Camp
From the Macintosh ROM of Classic days, to Open Firmware in Power Macs, and on to (U)EFI with Intel, and ending up with LLB and iBoot in Apple silicon Macs.
Three years and four major versions of macOS later, are Apple silicon Macs diverging from Intel models? It might look like it.
Before Apple added T2 chips to Intel Macs, external boot disks were valuable for many users. How has that fared since?
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 