In a mid-2012 MacBook running Catalina, I'm first going to replace the DVD SuperDrive with an SSD. Boot-up and then make sure the drive is recognized and wifi, Bluetooth, camera, etc. still work. ok.
Next, I want to replace the current drive with an SSD. However, I've looked over Migration Assistant and I don't understand my best option. Here is situation:
- each of the new internal drives are 1-tb Samsung 860 EVO and will be formatted APFS.
- the current drive is a 250-gb Samsung 840 EVO with 80-gb free space and is formatted APFS.
- a TmeMachine back-up exists on an external usb-drive formatted HFS+.
note: I have an external monitor connected via USB. The Catalina upgrade required some difficult security configuration to get it to work again and I don't want to redo this. I've also got a mysql database that I don't want to reconfigure with this upgrade.
Do I need to do a fresh install of Catalina? And thus have to re-configure my usb-monitor?
Can I mirror the current 250-gb drive onto the 1-tb SSD that replaces the DVD superdrive, and then mirror back that image onto the second 1-tb drive that will replace the 250-gb drive? My usb-monitor and mysql database shouldn't need re-configuration.
Will APFS not supporting TimeMachine effect this migration?
Or, just what is my best migration option? My current MacOS, app, and data arrangement are just like I want. Now, I just want to replace the disk it is on and add an additional disk. I've got plenty of cloud and extra usb drive storage to work with.