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Debugging these jobs is much easier with a gui like Here is another thread with tips on debugging agents and daemons. In a nutshell, add keys to redirect STDOUT and STDERR to files you can tail. <key>StandardErrorPath</key> <string>/tmp/local.job.err</string> <key>StandardOutPath</key&...


To prevent jack to start at login or boot remove the file homebrew.mxcl.jack.plist from ~/Library/LaunchAgents or /Library/LaunchDaemons(depending on if you install it with sudo or not). According to man brew: brew services [subcommand] Manage background services with macOS launchctl(1) daemon manager. If sudo is passed, operate on /Library/LaunchDaemons (...


In my case, I had this (misleading) Load failed: 5: Input/output error because the service was loaded already. A launchctl unload ~/Library/LaunchAgents/... solved this.

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