Windows Migration Assistant
Why is Windows Migration Assistant is unable to complete Transfer of Files from my Dell Desktop PC to my New 2021 iMac 24 in Big Sur Desktop?
Why is Windows Migration Assistant is unable to complete Transfer of Files from my Dell Desktop PC to my New 2021 iMac 24 in Big Sur Desktop?
Welcome to Apple Support Communities.
With some Windows PCs, the Windows Migration Assistant doesn't work that well. I strongly recommend to copy over your files manually using an external storage device.
-Jack
Windows Migration Assistant