Hi all. I have an issue.
I run the latest OSX on an external SSD connected to my 2014 Mac Mini via USB3.
Yesterday I booted up and it booted to the internal disk instead. I checked the SSD and found that the SSD had been wiped - there was no data at all, it was as though it had been formatted. Luckily I always back up using Time Machine so I was able to restore from the last backup and got all my files & OS back onto the SSD so that was great.
However I now find that I can't boot directly onto the SSD. It is set as the Startup Disk, however at boot it is not detected and my Mac always boots to the internal HDD. The SSD is detected once I've booted up and all the files are there. The only way I can boot to the SSD is to disconnect it, reboot while holding Option to get into the boot menu. I then connect the SSD and it appears in the list and i can now boot from it - it works fine and all my data is up to date. However next time I restart, it boots straight into the internal HDD again. It is as though the Mac is not detecting the SSD at boot time, so always uses the HDD. If I don't disconnect the SSD before I restart, holding down Option key has no effect - it ignores it and boots straight into the HDD. I have checked that the SSD is set as the Startup Disk when I'm booted into both the SSD and the HDD, it makes no difference.
Does anyone have any ideas what's going on?
Thanks!
I run the latest OSX on an external SSD connected to my 2014 Mac Mini via USB3.
Yesterday I booted up and it booted to the internal disk instead. I checked the SSD and found that the SSD had been wiped - there was no data at all, it was as though it had been formatted. Luckily I always back up using Time Machine so I was able to restore from the last backup and got all my files & OS back onto the SSD so that was great.
However I now find that I can't boot directly onto the SSD. It is set as the Startup Disk, however at boot it is not detected and my Mac always boots to the internal HDD. The SSD is detected once I've booted up and all the files are there. The only way I can boot to the SSD is to disconnect it, reboot while holding Option to get into the boot menu. I then connect the SSD and it appears in the list and i can now boot from it - it works fine and all my data is up to date. However next time I restart, it boots straight into the internal HDD again. It is as though the Mac is not detecting the SSD at boot time, so always uses the HDD. If I don't disconnect the SSD before I restart, holding down Option key has no effect - it ignores it and boots straight into the HDD. I have checked that the SSD is set as the Startup Disk when I'm booted into both the SSD and the HDD, it makes no difference.
Does anyone have any ideas what's going on?
Thanks!