I have two old Macbook Pros (late 2013, identical model). A is not needed anymore, has a broken battery and touchpad but 1 TB SSD. B is still in use by one person (for simple browser stuff that's ok) but has only 256 GB SSD (thus a system update isn't even possible anymore).
I'd like to use the 1TB SSD in the Macbook B. Besides of opening and getting the hardware stuff done, I wonder about the best strategy to do it. Of course there's a Time Machine backup from B on a NAS.
If I would simply replace the 256 GB SSD with 1 TB and restore from TimeMachine, then it's probably taking a long time due to NAS. However I should feel safe since if anything goes wrong, I can simply bring the small SSD back and everything should run as before.
So I wonder if I could just
- clean the 1TB (how exactly don't know), so the MBP aks for a system to install/migrate from
- switch them around (1 TB goes to B, 256 GB goes to A)
- start MacBook B and let it migrate from A (old SSD).
What if something goes wrong? If Macbook A was started with the small SSD to serve as a migration host, will it change anything on the SSD which may prevent it from run properly when switched back?
Any other suggestions? Anything to have in mind, maybe from OS perspective?