Tag: imac

  • T2 Macs don’t count as external boot media

    I don’t see this documented anywhere in an officially explicit way, so I’m writing a blog post on this. With the introduction of T2-chip Macs, Apple introduced something called Startup Security Utility, and the official line there is that you can change the setting to “Allow booting from external media,” and then you can boot…

  • Still waiting for root device on an iMac

    I’ve had fairly good luck cloning Macs using Disk Utility and a Thunderbolt cable. Recently I ran into one stubborn one that wouldn’t boot up properly after the re-image. It went straight to a flashing Do Not Enter symbol. That was a bit confusing. Was there a physical connection problem with the drive? I could…