[SOLVED] Boot from External HD

[officerbanks]

Will a new Imac with OS 10.6.2 boot from am External HD with OS 10.5.8?

 

[wildwell]

Try holding down: Command-Shift-Option-Delete together while the computer starts up. This is an older command that used to work in early versions of OSX.

If you can boot from the internal HDD without a problem, open your system preferences and select "Start-Up Disk." You can probably choose the external disk from there and restart.

 

[Ijack]

You might like to also look at rEFIt.