You can transfer files between a Mac booted into macOS Recovery and another Mac by sharing a volume and connecting the two computers with a USB, USB-C, or Thunderbolt cable.

1. Connect the two computers with a USB, USB-C, or Thunderbolt cable.

2. Start up your computer in macOS Recovery.

3. In the Recovery app, choose Utilities > Share Disk.

4. Select the volume you want to share, then click Start Sharing.

5. On the other Mac, open a Finder window, then click Network in the sidebar under Locations.

6. In the Network window, double-click the Mac that has the shared disk, click Connect As, select Guest in the Connect As window, then click Connect.

7. Transfer the files.

8. When you’re done transferring files, eject the volume on the other Mac.

9. In the Share Disk app, click Stop Sharing.

10. Choose Share Disk > Quit Share Disk.
    
    
    Use macOS Recovery on a Mac with Apple silicon - Apple Support