2014-05-29, 18:01 (This post was last modified: 2014-05-29, 18:02 by Milhouse.)
Check your xbmc.log for errors, I don't know why your XBMC is crashing, might be a OSX-specific bug. If you can reproduce it reliably you should raise it with the XBMC developers.
Texture Cache Maintenance Utility: Preload your texture cache for optimal UI performance. Remotely manage media libraries. Purge unused artwork to free up space. Find missing media. Configurable QA check to highlight metadata issues. Aid in diagnosis of library and cache related problems.