Restart your computer and boot to the internal hard drive like normal.
Perform the following steps in order to format your SSD and transfer your OS and data from your original drive. The preferred method is the “Internet Restore” method. If you are one of the affected Mac mini owners, then installing an SSD is a little different. If one or more of these factors are not involved, then you don’t have to worry, you can proceed as normal. If your installation involves all three factors, then you need to pay attention, as your installation will be affected. This particular instance affects you only if:
It’s a bit of a “perfect storm,” but it’s worth noting if you’re adding an SSD as a second drive in your Mac mini. The “Fusion Drive” option for the 2012 Mac minis can cause some severe data loss if you’re not careful.