What to do, when you can, before taking or sending your Mac in for service or repair. What about FileVault? And Activation Lock?
T2
Find My Mac provides valuable tools to help you locate and secure a misplaced, lost or stolen Mac. So what does Activation Lock add?
How to reset them, and what they do. Includes coverage of the SMC functions in T2 chips, and how to reset them too.
Diagnostic, Recovery, Safe, Startup Manager, Verbose, reset SMC/NVRAM, firmware restore, Target Disk/Display, Single-User (SUM) in outline.
Why is Apple soldering in the SSDs of so many new Macs? What problems does it produce, and should you avoid them?
Why do Macs with T2 chips show a black screen when starting up or updating their firmware, and why so long that it’s scary?
Single-user mode to run fsck to check and repair your boot disk became tricky with Fusion Drives. With a T2 chip, it’s not practical in its traditional form.
If you’ve been running pre-release firmware on your Mac’s T2 chip, trying to revert to a release version could brick it.
Although mainly aimed at Macs with T2 chips, this update brings better saving of main window size and position too.
Why couldn’t you install Security Update 2019-004 on your T2-free Mac, when the problem was in its T2 firmware update?
The Eclectic Light Company 