I've just downloaded your sampler and although it does open up in Logic Pro 10.3 (officially bought from Apple Store), it crashes whenever I try to do anything - say, press a button or load a sample. The crash log is provided. It's too large to be put as a quote, and also I somehow can't attach .pdf or .txt, so here's the link - http://www.filedropper.com/crashlogtxw16x (http://www.filedropper.com/crashlogtxw16x).
I run it on MacOS Sierra. Happens for all versions of a plugin (mono, 16x stereo, etc.) Reinstalling didn't help.