RELATED: Beginner Geek: Hard Disk Partitions Explained Select your Mac’s hard drive in the list on the left and select Partition on the right. From within Mac OS X, press Command + Space, type Disk Utility, and press Enter to open the Disk Utility. You’ll now need to resize your Mac OS X system partition to make room for your Linux distribution of choice. You should see the rEFInd boot manager screen. Shut down your Mac - a full shut down, not a restart - and boot it back up again.
