Migration Assistance
What if I choose to cancel the transfer of files from a windows pc to MacBook Air due to time involved? I started the process before noon & at 4:20pm it still has more than 23 hours left.
MacBook Air 15″, macOS 13.3
The result will be an incomplete migration. Whatever remains incomplete may or may not matter. At worst the Mac will not boot, in which case you just have to start over again.
It is not unusual for Migration Assistant to take a day, or more, to finish. The amount of time it will take to finish depends on the aggregate amount of information to transfer and the quality of your wireless environment (if applicable).