Some Mac users are experiencing an issue where StudioCloud will crash if a pdf is opened. This is an issue with Adobe Air which we have reported to Adobe and are waiting for a fix. Here is the temporary workaround until Adobe fixes this issue.
Step 1: Update to the latest minor update to receive the new pdf viewing options
Refer to the section "Enabling Updates For Minor Release Updates" in the following tutorial. If you have StudioCloud version 3.1.465 or later you can skip step 1.