I need to replace the original internal SSD (256GB) with a 512GB that has Time Machine on it and up to date.
I am hoping it were not required to involve yet a third disk - e.g. another USB hard drive in this process .. but am not clear on it. Let us call this 1TBdrive
Specifically it seems one solution would be:
- attach the 1TB hard drive and make it the time machine backup.
- power off the MBPro and physically swap the 256GB with the 512GB
- attach the 1TB USB hard drive and boot up, keeping the option button pressed to induce booting to time machine
- restore from 1TB TM to the new 512GB internal drive
Unfortunately I do not possess this 1TB external drive. So is there any way to do this with just the first two SSD's?
UPDATE Here is the relevant available disk space info
df -k Filesystem 1024-blocks Used Available Capacity iused ifree %iused Mounted on /dev/disk1 243915264 235014420 8644844 97% 58817603 2161211 96% / /dev/disk7s2 499771696 214002444 285769252 43% 53500609 71442313 43% /Volumes/os2mellyrn
Notice the externally attached SSD used for TM (disk7s2) still has 280GB available = more than twice the internal (active) SSD (disk1)