External HD Boot fails with Snow Leopard
When I try to boot from an external HD with 10.6 installed I get a kernel panic "unable to find a driver for this platform". My internal drive has 10.7 installed. Any suggestions as to how to resolve the issue?
Here's a bit of background. I have some files on my computer that are produced by applications no longer supported on the Mac. They worked fine under Rosetta with 10.6 but when I upgraded to 10.7 and Rosetta was dropped, so did my ability to access the files. I'm really keen to be able to at least open the files and see if I can export them to useful format, or even print them.
Today I purchased an external 1TB HD in the hope that this would solve my problem. I intended to boot up using Snow Leaopard. I installed it using the DVD purchased as part of the Mac Boxed Set a while back. There are two partitions on the HD, a 50GB section with 10.6 on it and a 950GB which is blank.
When the installation was complete the Mac automatically rebooted. Unfortunately it panicked midway through the restart. I've tried re-initialising the drive and checking the firmware. Everything seems ok there. I'm not sure what to do next.
Peter
iMac, Mac OS X (10.7.3)