The problem
Large file transfers over AirDrop, network shares, or FTP can fail when your Mac sleeps. The transfer pauses or the connection drops entirely.
Why it happens
File transfer apps rarely request sleep prevention. macOS treats them like any other app, and when the idle timer expires, the system sleeps and the network connection drops.
The fix: Shake It On
Shake It On keeps your Mac awake by moving the mouse slightly at regular intervals. macOS sees real user activity and resets the idle timer. Set it up with the right conditions and it only runs when you're actually file transfers.
Recommended conditions for file transfers:
- Only Shake If Wi-Fi is connected
- Paused When on battery