Hi guys,
I've been running a late 2009 27" iMac with a Samsung 840 SSD (replacing the SuperDrive) on Sierra. I've had persistent problems for a while booting up to the 'prohibitory' symbol. Usually a second or third restart eventually boots successfully. Running Disk Utility reports no errors. I was unable to find a solution to this problem. A clean install usually did the trick for a while but it would then reoccur.
I've just installed High Sierra successfully but after installing Little Snitch and rebooting I'm hitting the prohibitory sign again. The iMac boots into a Sierra recovery partition but this is unable to see the drive as it's formatted with APFS now.
Any ideas...
1) How can I create a High Sierra recovery partition on one of the other HD's in the iMac?
2) Shouldn't a 10.13 recovery partition have been created on the SSD in the first place?
3) Could Little Snitch be causing the 'prohibitory' boot issues?
Any help would be most appreciated!
Thanks
I've been running a late 2009 27" iMac with a Samsung 840 SSD (replacing the SuperDrive) on Sierra. I've had persistent problems for a while booting up to the 'prohibitory' symbol. Usually a second or third restart eventually boots successfully. Running Disk Utility reports no errors. I was unable to find a solution to this problem. A clean install usually did the trick for a while but it would then reoccur.
I've just installed High Sierra successfully but after installing Little Snitch and rebooting I'm hitting the prohibitory sign again. The iMac boots into a Sierra recovery partition but this is unable to see the drive as it's formatted with APFS now.
Any ideas...
1) How can I create a High Sierra recovery partition on one of the other HD's in the iMac?
2) Shouldn't a 10.13 recovery partition have been created on the SSD in the first place?
3) Could Little Snitch be causing the 'prohibitory' boot issues?
Any help would be most appreciated!
Thanks