I had this same problem a few months ago when I updated to Max 7, but in my case, it was solved when I made sure that the version of Max 7 I was running was in 64-bit mode. There was something odd about Max 7 on Mac OS X ElCapitan at the time in which it kept switching back to 32-bit mode (even after I switched to 64-bit mode). There is a workaround online that helps you ensure that your Max 7 runs in 64-bit mode. I’m also assuming you’re using the newest version of Max 7.