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I have a 2011 MacBook Pro where I took out the optical drive and replaced it with a second hard drive, but I'm looking to dual boot Slackware. These machines can't boot from USB sticks for whatever reason, and the optical drive is out, so I'm wondering if anyone can give me some pointers on what to do here.
Buy a USB adapter to connect your optical drive. IDE or SATA to use adapters are cheap. – Zoredache – 2011-09-10T01:16:21.807
Your machine is capable of booting from a USB flash drive, the drive may not be formatted correctly. – Dustin G. – 2011-09-10T02:58:41.763
There's a lot of people who don't know how to format a USB flash drive. http://forums.macrumors.com/showthread.php?t=1125135
– wjl – 2011-09-10T03:11:41.843