This is a smaller file (approx. 117MB) meant for systems already running an earlier version of 10.3. It updates 10.3.x to 10.3.9.
As the final 10.3 update, it fixed hundreds of bugs found in earlier versions (10.3.0–10.3.8).
As the final 10.3 update, it fixed hundreds of bugs found in earlier versions (10.3.0–10.3.8). mac os 1039 download top