LaunchAgent not launched

Question

I'm using SIMBL in one of my product and run into the problem that the LaunchAgent was not launched on some customer systems. It could be that the problem started with Mac OS X 10.8.3.

net.culater.SIMBL.Agent.plist:

<?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>Label</key>
    <string>net.culater.SIMBL.Agent</string>
    <key>Program</key>
    <string>/Library/ScriptingAdditions/SIMBL.osax/Contents/Resources/SIMBL Agent.app/Contents/MacOS/SIMBL Agent</string>
    <key>RunAtLoad</key>
    <false/>
    <key>LimitLoadToSessionType</key>
    <string>Aqua</string>
    <key>OnDemand</key>
    <false/>
</dict>
</plist>

I was able to fix the problem by adding:

<key>KeepAlive</key>
<true/>

Still I'm interested if this issue is because of changes with Mac OS X 10.8.3 or something else.

Answer 1

OnDemand key has been deprecated in Mac OS X 10.5 and later so you should use KeepAlive option.

The deprecated feature still works in the current version of the software, but it may raise error messages or warnings.[1]