12-01-2021, 01:19 AM
For a 2015 MBA, and using an NVME SSD in an external USB enclosure, I tried using CCC and couldn't get a bootable drive. I tried to install Big Sur directly, and transfer the data over with CCC and SuperDuper, neither worked.
Finally I took the existing working install out of the MBA, installed the NVME SSD in the Mac, put the SSD that had been in the MBA into the enclosure, booted from the external SSD, and then used SuperDuper in the mode "Erase, then install" in SuperDuper.
Total PITA.
Finally I took the existing working install out of the MBA, installed the NVME SSD in the Mac, put the SSD that had been in the MBA into the enclosure, booted from the external SSD, and then used SuperDuper in the mode "Erase, then install" in SuperDuper.
Total PITA.