Call of Duty: Black Ops crashes randomly throughout gameplay on 10.11.
*UPDATE 11/13*: Crashing is still ongoing with 10.12 but it's lessened drastically. We recommend updating to 10.12 (Sierra) through the Updates tab of your App Store app.
We've got this issue logged with our QA/Dev team and are working towards an update to resolve it. There's no definitive eta on if/when it will be fully resolved. Please subscribe to this article to be notified of further announcements.