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Any ideas or suggestions?

Hi, the error indeed disappeared with an older version of Xcode and the latest Xcode 11 beta (2). Thanks a lot for your help!

Hi, thanks a lot for your answer! I checked the entitlements in the application binary and during runtime and can confirm they are presentsebastian$ cat foo.entitlements<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"><plist version="1.0"><dict><key>com.apple.security.cs.disable-library-validation</key><true/><key>com.apple.security.cs.allow-jit</key><true/><key>com.apple.security.cs.allow-unsigned-executable-memory</key><true/><key>com.apple.security.cs.allow-unsigned-executable-memory</key><true/><key>com.apple.security.get-task-allow</key><true/></dict></plist>sebastian$ codesign -d --entitlements - /Users/sebastian/Downloads/Foo.appExecutable=/Users/sebastian/Downloads/Downloads/Foo.app/Contents/MacOS/Foo??qq<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"><plist version="1.0"><dict><key>com.apple.security.cs.disable-library-validation</key><true/><key>com.apple.security.cs.allow-jit</key><true/><key>com.apple.security.cs.allow-unsigned-executable-memory</key><true/><key>com.apple.security.cs.allow-unsigned-executable-memory</key><true/><key>com.apple.security.get-task-allow</key><true/></dict></plist>sebastian$ codesign -d --entitlements :- 36452Executable=/Users/sebastian/Downloads/Foo.app/Contents/MacOS/Foo<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"><plist version="1.0"><dict><key>com.apple.security.cs.disable-library-validation</key><true/><key>com.apple.security.cs.allow-jit</key><true/><key>com.apple.security.cs.allow-unsigned-executable-memory</key><true/><key>com.apple.security.cs.allow-unsigned-executable-memory</key><true/><key>com.apple.security.get-task-allow</key><true/></dict></plist>I still receive the same error in Xcode:Could not attach to pid : “36452”Just to double check, here are some information. I use macOS 10.14.5 with Xcode 11.0 beta (11M336w). I added the entry com.apple.security.get-task-allow manually to my foo.entitlements file and sign it through my manual build chain with:codesign -o runtime --entitlements foo.entitlements --force --sign "..." Foo.app1) Is there any difference between <key>com.apple.security.get-task-allow</key> and <key>get-task-allow</key>? I can find examples for both.2) Is there any difference between the foo.entitlements and an entitlement plist file? In several documentations I find a reference that the get-task-allow flag must be added to the entitlement plist

xcrun altool --notarize-app --verbose