AE 2018 Crashes (15.1.2)
Having a lot of issues with After Effects on Mac recently. The program crashes when I attempt to preview and sometimes when I try to send to Media Encoder.
I have attached the report log below.

Thank you for filing this bug report, and for attaching the crash log.
The crash log indicates that the GenArts Sapphire plug-in is causing the crash. (See Thread 28 in the log.) Have you contacted BorisFX/GenArts regarding this problem?
Also, have you tested this comp in the current release of After Effects CC, version 16.0.1? You can install this version via the Creative Cloud desktop application.
If you need further assistance with this issue, this could be addressed more easily by our support team. You can open a case with them via call or chat at this link: https://helpx.adobe.com/contact.html