Nothing has changed in the OS or firmware. Zap your PRAM and try again. If that doesn't work, plug in a USB keyboard and see if maybe the bootloader likes the option key on that keyboard better than the built-in one.
> On Apr 7, 2018, at 12:37 PM, Michael <[email protected]> wrote: > > I am running 10.9.5, on a 15 inch, mid 2014 MacBook Pro. > > I used to be able to use startup disk in system preferences to select a 10.12 > USB stick. > > I used to be able to hold down the option key and get a chooser at boot time. > > I even wondered if maybe the bless information had gotten cleared > > bash-3.2# bless --info . > finderinfo[0]: 606 => Blessed System Folder is > /Volumes/Sierra10-12test/System/Library/CoreServices > finderinfo[1]: 440225 => Blessed System File is > /Volumes/Sierra10-12test/System/Library/CoreServices/boot.efi > finderinfo[2]: 0 => Open-folder linked list empty > finderinfo[3]: 0 => No alternate OS blessed file/folder > finderinfo[4]: 0 => Unused field unset > finderinfo[5]: 606 => OS X blessed folder is > /Volumes/Sierra10-12test/System/Library/CoreServices > 64-bit VSDB volume id: 0xD0753A395E418072 > bash-3.2# cd / > bash-3.2# bless --info . > finderinfo[0]: 803839 => Blessed System Folder is /System/Library/CoreServices > finderinfo[1]: 846201 => Blessed System File is > /System/Library/CoreServices/boot.efi > finderinfo[2]: 0 => Open-folder linked list empty > finderinfo[3]: 0 => No alternate OS blessed file/folder > finderinfo[4]: 0 => Unused field unset > finderinfo[5]: 803839 => OS X blessed folder is /System/Library/CoreServices > 64-bit VSDB volume id: 0x82BCF4CF22760DAE > bash-3.2# > > > The bless information on my USB stick looks similar to what I see on my hard > drive. > > I used to be able to do this. > > I am no longer able to boot off of a USB stick. I am no longer able to boot > from my recovery mode partition. > > Help? How do I make this work, or has Apple done something to the firmware > and this will not work at all anymore? > > /Volumes/EFI/EFI/APPLE/FIRMWARE/MBP112_0138_B25_LOCKED.scap has a date of > 2017-09-26 > > > And for completeness, > bash-3.2# bless --info /Volumes/Recovery\ HD/ > finderinfo[0]: 24 => Blessed System Folder is /Volumes/Recovery > HD/com.apple.recovery.boot > finderinfo[1]: 25 => Blessed System File is /Volumes/Recovery > HD/com.apple.recovery.boot/boot.efi > finderinfo[2]: 0 => Open-folder linked list empty > finderinfo[3]: 24 => Alternate OS blessed file/folder is > /Volumes/Recovery HD/com.apple.recovery.boot > finderinfo[4]: 0 => Unused field unset > finderinfo[5]: 24 => OS X blessed folder is /Volumes/Recovery > HD/com.apple.recovery.boot > 64-bit VSDB volume id: 0xE93483E4DDDE9594 > > > And something I just thought of in case it makes a difference: on the USB > stick, > > bash-3.2# bless --info /Volumes/Recovery\ HD/ > finderinfo[0]: 23 => Blessed System Folder is /Volumes/Recovery > HD/com.apple.recovery.boot > finderinfo[1]: 24 => Blessed System File is /Volumes/Recovery > HD/com.apple.recovery.boot/boot.efi > finderinfo[2]: 0 => Open-folder linked list empty > finderinfo[3]: 23 => Alternate OS blessed file/folder is > /Volumes/Recovery HD/com.apple.recovery.boot > finderinfo[4]: 0 => Unused field unset > finderinfo[5]: 23 => OS X blessed folder is /Volumes/Recovery > HD/com.apple.recovery.boot > 64-bit VSDB volume id: 0x00D7DD48B1E38F6A > bash-3.2# ls /Volumes/EFI/ > total 6 > 1 .Spotlight-V100/ 1 .Trashes/ 4 ._.Trashes* 1 > .fseventsd/ > > > --- > Entertaining minecraft videos > http://YouTube.com/keybounce > > _______________________________________________ > MacOSX-talk mailing list > [email protected] > http://www.omnigroup.com/mailman/listinfo/macosx-talk _______________________________________________ MacOSX-talk mailing list [email protected] http://www.omnigroup.com/mailman/listinfo/macosx-talk
