Originally Posted By: kevs
How do you not have a bootable system? I don't think that has happened to me... maybe years ago.not even sure.

The regular boot drive on the system had become corrupted during installation of a beta software release which among other things included converting the boot drive from HFS+ to APFS (encrypted} so my clone could neither access the drive or repair it.

Originally Posted By: kevs
And you use the edrive? — I've hardly used that so rusty- should practice it.

Actually I don't use an E-Drive per. se. for many reasons. Instead I have a "ProToGo" USB SSD with two bootable images on it.
  1. an image of the Recovery Drive plus TechTool Pro which will boot any recent Mac; run TTP or Disk Utilility. Restore the entire system or just the data and/or apps from another drive or Time Machine Backup.
  2. a Basic image that will only boot the system it was created on or an identical configuration and includes several repair and maintenance utilities including TTP.

Originally Posted By: kevs
And booting from TM? Can't get my head around that either. seems very complicated. I don't even think I have system on TM not sure.

You cannot boot from Time Machine, but you can boot from the Recovery Drive (or a ProToGo image of the Recovery Drive) and reinstall from a Time Machine backup.

Booting from the Recovery Drive is accomplished by
  • Holding ⌘R during a cold boot (reinstall the MacOS version that was on your computer
  • Holding ⌥⌘R during a cold boot (install the latest version of MacOS that is compatible with your computer
  • Holding ⇧⌥⌘R during a cold boot (installs the version of MacOS that shipped with your computer or the closest available version.

Last edited by joemikeb; 03/03/19 07:55 PM.
If we knew what it was we were doing, it wouldn't be called research, would it?

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