Long: as soon as you have the possibility to enter the Recovery Partition (start while holding the CMD+R keys) you can format (from the RP), but since there is no RP on the new disk, you should format it before you take the 'old' one out. Provide details and share your research! But avoid ….
Osstatus error 28 14) 2017 iMac running MacOS Sierra (10.
