Some Photo Mechanic 6 users on macOS Mojave (OS version 10.14) have noticed a problem with images rendering slowly. We highly recommend updating to the latest version of Photo Mechanic 6, which has resolved the issue for most users. 

You may also want to try these additional trouble-shooting tips for slow rendering

If you have not yet purchased Photo Mechanic 6, we recommend that you take advantage of the free 30-day trial to make sure it works well on your system.