cornerstone出錯經常是因為緩存的問題造成了，今天介紹下cornerstone清除緩存的方法。

1. Quit Cornerstone

2. Open Terminal

3. Copy paste the following line into Terminal:

defaults delete com.zennaware.Cornerstone HistoryCacheUsage

4. Press return

5. Open Finder

6. Select Go->Go To Folder…

7. Enter:

~/Library/Caches/Cornerstone

and click “Go”

8. Move the selected directory (“Cornerstone”) to the Trash.

9. Restart Cornerstone

The next time Cornerstone prompts you to cache the repository log, choose “Never”.