This is on Singularity since the update yesterday? Could you please send a bug report, and it would be great, if you can include logs (preferably from LogLite (see https://support.eveonline.com/hc/en-us/articles/202078999-EVE-LogLite-Diagnostic-Tool- )
This said, I have seen in our crash reporting system a significant increase of client crashes on the Mac on Singularity - so it is possible that this is related to this.