Thank you. This got me on the right path. Turns out, I have dynamic library validation disabled specifically because I want to allow plugins to load. At first, I thought a cocoa pods (bug?) was my problem; with paths such as this appearing: Load command 117 cmd LC_RPATH cmdsize 112 path /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/macosx (offset 12) However; I have another app with exactly the same LC_RPATH and that has never had an issue. More digging resulted in me finding a broken framework due to another (different) issue, referencing LC_RATHS from /User So thanks for the advice. It greatly helped me find the root cause. Out of interest, do you know if there's a reason the /Applications/Xcode path does not cause the same fault?

This is on an M1, os 12.5. I get same behaviour on an Intel as well. In console, I get: ASP: Security policy would not allow process: 12022, /Users/neil/Downloads/iShowU Switcher.app/Contents/MacOS/iShowU Switcher ... [app<application.com.shinywhitebox.iShowUSwitch.58885753.58885759(501)>:12022] termination reported by launchd (9, 8, 9) but no further information that I can find. Oh; just above that is: - 45683955: Checking whether application is managed at file:///var/folders/38/ctsh1hxn4mjbsbw2qmyr81100000gn/T/AppTranslocation/83AC8B29-8DAA-4535-BED4-3A7688B3170F/d/iShowU%20Switcher.app//com.shinywhitebox.iShowUSwitch so translocation is happening, but AFAIK that shouldn't matter? (but I'm not sure)