Debugging Plists Issues
When you’ve created or modified a Plist file and the desired service or application doesn’t start as expected, there are a few things you can do to locate and debug errors related to the plist files:
First, set the
StandardErrorPath fields in the XML plist file:
<key>StandardErrorPath</key> <string>/tmp/mycommand.err</string> <key>StandardOutPath</key> <string>/tmp/mycommand.out</string>
Second thing is to check the system log for any messages related to your plist:
$ tail -F /var/log/system.log | grep "com.apple.myPlist"