Firstly, apologies if this EXACT question has been asked before... Tried searching but couldn't find the answer... I have a 2011 imac i7, i didn't want to pay the stupid amount to have a SSD from factory and have read online that its a bit of a task to install one afterwards... I'm a complete novice so don't want to start pulling the mac apart My question therefore is using the below product and plugging into the mac using FW would i have any issue booting the OS from this? http://eshop.macsales.com/shop/firewire/EliteALmini/eSATA_FW800_FW400_USB My intention would be to keep the OS installed on the original internal HDD just incase anything went wrong with the SDD. Appreciate the advice Side note would i have any problems daisy chaining from this device to another, shouldn't affect startup?