How long does migration take?

You should not migrate via a network It is too slow and data corruption may occur. Use wired USB connection to connect the two computers and I would guess that the transfer can be completed in an hour or so, depending on the volume of data to be transferred.

I migrated from a 2016 MBP to a 2022 MBA over the network and it took less than three hours. It may have been less than two but I can't quite remember. What I do remember was being very surprised that it went that quickly. Much depends on the network speed, of course.

But, I agree with Ronasara. Go with wired. By the time you figure out what the problem is with doing it wirelessly, you could probably be done.

Ronsara--

I would love to vote for your suggestion, but:

USB-C is NOT a Network interface, and is NOT suitable for computer-to-computer transfer. So if you connect a USB-C cable...

... it will use Wi-Fi anyway.

You could use a Genuine Thunderbolt cable, provided both computers support Thunderbolt.

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USB-C cables are never listed in System preferences > Networks

But a Thunderbolt cable to another capable computer can be listed if you add ThunderBolt to the list of interfaces.

USB-C is the name of the connector, ONLY.

ThunderBolt is the name of the broad family of different connection types possible.

The many different types of devices and cables you connect can run displays, high-speed data transfers of several different types, and interface directly to peripherals of many descriptions. The first or only item you connect specializes the interface for a particular use, and that specialization typically takes place at the computer end.

ThunderBolt cables have twice as many data pathways as USB 3 cables. ThunderBolt is usable as a network interface, USB is not.

I’m trying to transfer about 700-800GB from a 2010 iMac to a new Macmini. Using wifi and it’s been going 2 days. Should it take this long? If I stop it as and go with a usb cable which port do I plug into?I thought they were inputs.

I have found it useful to keep a variety of these cables which I seem to need periodically. They are readily available from numerous sources.