Apple Migration Assistant transfer procedure
Apple Migration is preinstalled on all Macs and can be used to import your old account from your old Mac directly using a point-to-point network transfer or it can import from your Apple Time Machine backup from an external USB drive. You do not require any special cables, you can use Wi-Fi although transfer may be faster by Thunderbolt cable. If both Macs have a Thunderbolt 3 (USB-C) port you can use the usb-c cable from your MacBook charger but data-transfer speed is limited to 480Mbps (USB 2.0). Transfer will be quicker if using a Apple Thunderbolt 3 (USB-C) cable with the Thunderbolt logo on the sleeve of each connector. and can transfer up at up to 10 Gbps on most Macs manufactured in the last few years.If using Wi-FI keep both computers near each other throughout the migration process.
To launch, open Apple Finder and select 'Migration Assistant' from the 'Utilities' group.
When prompted we would recommend you only migrate your account and not applications from your old Mac. Install the latest versions of applications on your new Mac. This is particularly important when you are moving from an Intel Mac to a new Mac with Apple CPU (M1/M2) as native Apple Silicon complied apps are likely to offer better performance. Apps compiled for Intel CPU may run but will be running in Intel emulation mode which may be slower. If your new Mac is enrolled in WIN's Orchard Mac management suite apps can be installed simply by visiting the Orchard software centre.
Large transfers may need hours to complete, and may seem to pause occasionally. You may want to start in the evening and allow migration to complete overnight.
The procedure is detailed further on Apple's support site.