Mac Pro (Mid 210) Since installing El Capitan on new HGST 6T drive I can ONLY boot this system by resetting NVRAM. If I try to restart I get apple, progress meter, then circle with line through it symbol.
System has another separate drive with OS Mavericks. This drive can be set as startup drive and can boot with restart.
I tried .... Boot to recovery mode, run disk utils on all drives...all fine Moved all kernel extensions not found in recovery partition out of /Volumes/bhgstboot/Library/Extensions....still won't boot without resetting NVRAM
Try setting startup disk from system preferences. Click unlock, select my hgst drive, click on lock (does not let me lock). Sometimes it comes back with error from bless, most times it just hangs
4 # bless --info /Volumes/bhgstboot finderinfo: 56 => Blessed System Folder is /System/Library/CoreServices finderinfo: 8908212 => Blessed System File is /System/Library/CoreServices/boot.efi finderinfo: 0 => Open-folder linked list empty finderinfo: 0 => No alternate OS blessed file/folder finderinfo: 0 => Unused field unset finderinfo: 56 => OS X blessed folder is /System/Library/CoreServices 64-bit VSDB volume id: 0x7254F8914231C18C
systemsetup doesn't see bhgstboot drive
8 # systemsetup -liststartupdisks /Volumes/bootableOS_wd4T/System/Library/CoreServices /System/Library/CoreServices 10 # systemsetup -getstartupdisk
If I startup holding down option /Volumes/bhgstboot shows up , I can select it but after Apple logo and progress bar , I get circle with line through it.
The ONLY way I can boot from this drive is by holding down Cmd-opt P-R