how long does it take to migrate a computer

kkwahine wrote:

How long does it take to migrate a computer?

It is relative. Probably no less the 45 minutes..

Use a cable connection.

The most trouble free way to move to a new machine, is using the Setup Assistant on the initial boot of a brand new machine— you have one shot here. https://support.apple.com/en-us/HT205749

The second best way is use the Migration Assistant.

How to move your content to a new Mac https://support.apple.com/en-us/HT204350

if you still gave an issue: https://getsupport.apple.com/

Depending on how much data you have it could take anywhere between ~40 minutes and ~2 hours.

I did mine via Thunderbolt 3 cable and it took me ~45 minutes...