I thought this might be useful for others as i was initially trying unsuccessfully to trigger it via crontab. And instead wound up using the verbose syntax of plist. The code cd’s into a dir and then triggers a python script at 1pm and 8pm. For those that are interested i’m using a sort of hacked version https://github.com/xebia/farmbot-py
put the plist file into your ~/Library/LaunchAgents/
<?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>your.file.name.here</string>
<key>StandardOutPath</key>
<string>/path/to/stdout</string>
<key>StandardErrorPath</key>
<string>/path/to/errout</string>
<key>WorkingDirectory</key>
<string>/path/to/code</string>
<key>ProgramArguments</key>
<array>
<string>/path/to/python</string>
<string>/path/to/file.py</string>
</array>
<key>StartCalendarInterval</key>
<array>
<dict>
<key>Hour</key>
<integer>13</integer>
</dict>
<dict>
<key>Hour</key>
<integer>20</integer>
</dict>
</array>
</dict>
</plist>