If the Mac can hold both the new drive and the original drive (for example, a 2006-2012 Mac Pro, or a laptop or Mac mini with a Data Doubler) no enclosure should be necessary. In some cases, you'll need a special enclosure for Apple's SSD. Depending on the drive’s capacity and connector type, you can use one of the following solutions to connect it to an External Enclosure, the OWC Drive Dock, or the Newer Technology Universal Drive Adapter. We offer many DIY kits with an external enclosure included. If you plan to use your old drive for external storage when the migration process is complete, you can install that drive into an enclosure. For single-drive computers, you'll need a device to connect the old drive to your computer after your new drive is installed.

To transfer your data, you'll need both your original drive and your new drive, connected at the same time. Make sure you have a way to transfer your data