Download Backdrop

Verify download checksum

SHA-256:

08c72d419eaa805d4b6443fb0c5aa2dae917592c9dc6c766164acf505c83fea6

Open the disk image, drag Backdrop to Applications and launch it. Complete setup, then open Settings → License to activate your purchase.

Backdrop requires macOS 15 or later and Accessibility permission to manage windows.