The only HDs that show up while holding down the Option key at Start Up, are bootable Partitions on the Internal HD. Snow Leopard always shows up as a Start Up Disk in the System Preferences. On the positive side, I have none of the symptoms described in other threads: Time Machine works flawlessly, and both the boot partition and the Time Machine partition appear on the Snow Leopard desktop every time I connect the drive.ĭoes anyone have the same issues? Does anyone know of a workaround? Clearly, something in the OS has changed with respect to the way booting from external drives is handled. This happens regardless of whether I'm connected by means of FireWire 400 or 800.Īfter spending a lot of time looking at the usual suspects (cables, permissions, PRAM, etc.) I reinstalled Sand Leopard (OK, 10.5) and lo and behold, the drive boots again (though for some reason I still have to go through the disconnect/reconnect routine). Eventually, the system boots from its internal drive. I select it, and it appears to begin to boot, then it just sits on the gray screen with the little round thingie turning for a long time (five to ten minutes). Holding down the Option key while rebooting does not show the external drive unless I disconnect and reconnect the FireWire cable. Over the weekend, I upgraded the external drive to Snow Leopard, and now it can no longer be used to boot the laptop. I had created a 30 GB Leopard boot partition with various utilities and tools since the small drive goes wherever the laptop goes, I figured it might come in handy to be able to boot the computer in the event something went wrong with its internal 250 GB drive. I use a Western Digital My Passport Studio 500 GB external drive to back up my MacBook Pro with Time Machine.
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