After each step, please re-test the issue.
- First try exiting and restart Steam
- Then make sure your Mac is fully updated
- If that doesn’t work, exit Steam and rename the ClientRegistry.blob and restart Steam
- If you’re still having issues exit Steam and delete everything except SteamApps under the Steam installation directory, ~/Users/[username]/Library/Application Support/Steam, this will force Steam to update when you log in
- Complete the Verifying GCF Cache File