what is wrong with my lightroom? I just updated it yesterday and now it keeps crushing
Which version of Lightroom are you using?
Where are you trying to Export?
If it is the latest version.Please refer Lightroom and El Capitan | Mac OS 10.11
This has been a crippling and annoying issue since the latest LR update. I just applied the steps in your message. Hopefully it'll work.
Retrieving data ...