Enable Developer options

Developer options contains the USB debugging switch. The location can differ between tablet models.

Try these in order

Find Build number

Open Settings → About tablet and look for Build number. On Samsung, open Software information first.
Tap Build number seven times

Enter your tablet’s PIN if Android asks. Stop when Android says Developer options is enabled.
Turn on USB debugging

Go back to Settings and find Developer options. It may be inside System. Follow Turn on USB debugging.

Boox and other tablets

Boox can expose USB Debug Mode in App Management. Follow the Boox guide.

If your settings differ, search Settings for Build number or check your tablet’s manual.

Manufacturer instructions

Android Developer options · Samsung Developer options

Still stuck?

Email [email protected] and describe what you see.

Include your tablet model and the message in SuperMirror. The Logs button in the Mac menu copies a report you can paste.

SuperMirror for Mac · All connection checks