Mac Pro will not boot from any thumb drive
I have an early 2008 Mac Pro. I have never been able to boot from a thumb drive with ML, Mavericks and now Yosemite. Setting the startup disk to the thumb drive results in a display of other bootable drives upon reboot. If I use the option key, the still connected thumb drive is ignored. For some reason even though the thumb drive is GUID, it is not displayed as the orange icon with their interface printed on it. The shape is the same but totally white with a black horizontal stripe on the bottom of it depicting the disk slot. Perhaps the h/w and/or firmware is too old to mount/boot from a thumb drive. I may try a new partition on one of my other 4 internal bay drives, but this seems like using a thumb drive is such a no-brainer. Except in my case.
Note that I followed "Option 3 - Use Terminal" to create the bootable drive:
http://www.macworld.com/article/2367748/how-to-make-a-bootable-os-x-10-10-yosemite-install-drive.html
About This Mac shows:
USB Flash Memory:
Product ID: 0x6544
Vendor ID: 0x0930 (Toshiba Corporation)
Version: 1.00
Serial Number: CC52AF4C82E6CD914399B719
Speed: Up to 480 Mb/sec
Manufacturer:
Location ID: 0xfd100000 / 2
Current Available (mA): 500
Current Required (mA): 200
Capacity: 31.02 GB (31,024,349,184 bytes)
Removable Media: Yes
Detachable Drive: Yes
BSD Name: disk4
Partition Map Type: GPT (
GUID Partition Table)
S.M.A.R.T. status: Not Supported
Volumes:
EFI:
Capacity: 209.7 MB (209,715,200 bytes)
BSD Name: disk4s1
Content: EFI
OS X Yosemite Install:
Capacity: 30.16 GB (30,164,586,496 bytes)
Available: 23.69 GB (23,688,826,880 bytes)
Writable: Yes
File System: HFS+
BSD Name: disk4s2
Mount Point: /Volumes/OS X Yosemite Install
Content: Apple_HFS
Volume UUID: D0EA3143-C35D-3504-8EE6-A859EFC72EE1
disk4s3:
Capacity: 650 MB (650,006,528 bytes)
BSD Name: disk4s3
Content: Apple_Boot
