I have a brand new 2023 Mac Mini M2 8GB 256GB. I am attempting to use an external SSD (NVMe in an enclosure) as the main drive.
I reformatted the external SSD to AFPS GUID and named it Ext Macintosh HD. I then downloaded the latest Sonoma today from the Mac App Store. I installed Sonoma to the external drive successfully, the Mac Mini then rebooted and it booted back up into the internal drive. I tried setting the Startup Disk to the External SSD in System Settings and then attempted to reboot and I received this message:
An error occurred while setting “Ext Macintosh HD” as the startup disk: The operation couldn’t be completed. (SDErrorDomain error 108.)
I have attempted this a few times with the same result each time.
Does anyone have any experience with this?
I read that the booting into recovery (holding down the power on button on the back of the Mac Mini) and then allowing the Mac to boot from an external drive is possible but I followed the instructions from a website and there was no setting that allowed that, just a reduction in security settings.
I reformatted the external SSD to AFPS GUID and named it Ext Macintosh HD. I then downloaded the latest Sonoma today from the Mac App Store. I installed Sonoma to the external drive successfully, the Mac Mini then rebooted and it booted back up into the internal drive. I tried setting the Startup Disk to the External SSD in System Settings and then attempted to reboot and I received this message:
An error occurred while setting “Ext Macintosh HD” as the startup disk: The operation couldn’t be completed. (SDErrorDomain error 108.)
I have attempted this a few times with the same result each time.
Does anyone have any experience with this?
I read that the booting into recovery (holding down the power on button on the back of the Mac Mini) and then allowing the Mac to boot from an external drive is possible but I followed the instructions from a website and there was no setting that allowed that, just a reduction in security settings.