Simple Utility Script for allowing debug of hardened macOS apps.

add_debug_entitlement.sh

#! /bin/bash
# Simple Utility Script for allowing debug of hardened macOS apps.
# This is useful mostly for plug-in developer that would like keep developing without turning SIP off.
# Credit for idea goes to (McMartin): https://forum.juce.com/t/apple-gatekeeper-notarised-distributables/29952/57?u=ttg
# Update 2022-03-10: Based on Fabian's feedback, add capability to inject DYLD for sanitizers.
#
# Please note:
# - Modern Logic (on M1s) uses `AUHostingService` which resides within the system thus not patchable and REQUIRES to turn-off SIP.
# - Some hosts uses separate plug-in scanning or sandboxing. 
#     if that's the case, it's required to patch those (if needed) and attach debugger to them instead.
app_path=$1

if [ -z "$app_path" ];
then
    echo "You need to specify app to re-codesign!"
    exit 0
fi

# This uses local codesign. so it'll be valid ONLY on the machine you've re-signed with.
entitlements_plist=/tmp/debug_entitlements.plist
echo "Grabbing entitlements from app..."
codesign -d --entitlements - "$app_path" --xml >> $entitlements_plist || { exit 1; }
echo "Patch entitlements (if missing)..."
/usr/libexec/PlistBuddy -c "Add :com.apple.security.cs.disable-library-validation bool true" $entitlements_plist
/usr/libexec/PlistBuddy -c "Add :com.apple.security.cs.allow-unsigned-executable-memory bool true" $entitlements_plist
/usr/libexec/PlistBuddy -c "Add :com.apple.security.get-task-allow bool true" $entitlements_plist
# allow custom dyld for sanitizers...
/usr/libexec/PlistBuddy -c "Add :com.apple.security.cs.allow-dyld-environment-variables bool true" $entitlements_plist
echo "Re-applying entitlements (if missing)..."
codesign --force --options runtime --sign - --entitlements $entitlements_plist "$app_path" || { echo "codesign failed!"; }
echo "Removing temporary plist..."
rm $entitlements_plist

@mpielikis - I suspect your issue isn't related to script. Maybe release builds universal but debug only arm64? S1 v4 was never released as Apple silicon.
Also the script allow debug but isn't related to host scanning.

Thanks! This worked nicely for me with the Steinberg VST3PluginTestHost, using my arm64 MacBook Pro on Monterey👌🏻