Check the USB cable.
Often, the cable connected to the Mac can be to blame for Android File Transfer not working.
Check the cable for cuts, frays, or bends in the connectors.

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Alternatively, if you’re able, try a different cable to see if you have better results.
Try a different USB port.
Reboot your phone and Mac.
It’s a cliche, but it often works.
Unplug your Android and then restart both devices before trying again.
There might be a bug fix that addresses this very problem.
Reinstall Android File Transfer.
It’s always possible that the app itself has become damaged or corrupt.
In that case, drag the app into the trash and reinstall it.
Google no longer offers this program as a download from their website.
Uninstall Kies or Smart Switch.
Unfortunately, that software can interfere with the proper operation of Android File Transfer.
Turn on USB debugging.
You’ll need toenable Developer Modeif it’s not already switched on.
Use a different Android file transfer app.
We like to useLocalSend,OpenMTP, andMacDroid.
Other causes include bad cables orUSB ports, third-party app interference, and unresolved software bugs.
FAQ
Totransfer files from Android to iPhone, use the Move to iOS app on Android.
Next, set up (or reset) your new phone and choose to restore data from another unit.
To transfer individual files,set up Bluetooth transferbetween both devices.