Migration transfer stalled at 24 hours.

Were you using WiFi to transfer the data from one mac to another, that is a bad idea

it is far too slow and not particularly stable.

If you are going to use Migration Assistant have your macs connected by cable.

If you are going to use Migration Assistant only ask it to transfer your personal data.

Asking MA to transfer system files and apps is not a good idea.

If you transfer older system files from an older OS then you could overwrite the new

operating systems files, this can compromise the newer mac.

Migrating apps from your older mac to a newer mac is not advised.

The older apps will most probably not work on the newer mac,

so download new updated versions for the newOS on the new mac.

Often is a lot easier and quicker to avoid MA and do the transfer yourself.

Either connect the two macs together via cable and drag and drop only

your personal data to the new mac.

Or copy your personal data onto an external hard drive or USB flash drive

then connect it to your new mac and copy the files of the hard drive or USB.

Yes.