Since there are two internal drives (a 24gb SSD and 1TB HDD) you will have to go through a lot of crap to set the 1TB as your startup disk which involves using disk utility to initialize the drive, then reboot into recovery mode to do a clean install of Mac OS onto the 1 TB drive, and then go to system preferences to make sure that the startup disk is set to the 1TB drive. Honestly giving three stars because there could have been instructions included for this issue since there are complaints of this problem in the reviews. Almost returned it due to this issue.