ioSafe Duo - Create a Boot Drive

ioSafe Duo User Manual
3.2.3 Create a Boot Drive
To create a boot drive, you must first install macOS on the ioSafe Duo by using a third-
party app like MacDaddy Install Disk Creator. Next, go to System Preferences → Startup
Disk. A window will list the available bootable volumes. Select the volume from which you
wish to boot. Another method is to hold down the Option key during boot up. A screen
should appear that allows you to select the volume you wish to use. This is useful if you
are sporadically booting from the ioSafe Duo.
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