James, thanks for the response. First, I'll note that I found the same file on my MacBook Pro, which is using Big Sir since it cannot update to the new OS. The files I found in the suggested directories are below. I did not find reference to the "open" command in any of the files. All of the files seem valid except for a few I identify with bold font:
/Library/LaunchDaemons/
com.microsoft.teams.TeamsUpdaterDaemon.plist
com.adobe.ARMDC.SMJobBlessHelper.plist
com.microsoft.OneDriveUpdaterDaemon.plist
com.adobe.ARMDC.Communicator.plist
jp.co.canon.MasterInstaller.plist
com.nvidia.cuda.launcher.plist
com.google.keystone.daemon.plist
com.teamviewer.Helper.plist us.zoom.ZoomDaemon.plist=
com.microsoft.office.licensingV2.helper.plist
com.microsoft.office.licensing.helper.plist
com.microsoft.autoupdate.helper.plist
/Library/LaunchAgents/
jp.co.canon.MasterInstaller.plist
com.nvidia.cuda.launcher.plist
com.google.keystone.daemon.plist
com.teamviewer.Helper.plist us.zoom.ZoomDaemon.plist
com.microsoft.office.licensingV2.helper.plist
com.microsoft.office.licensing.helper.plist
com.microsoft.autoupdate.helper.plist
/Library/StartupItems/
360ControlDaemon - this is related to a bluetooth transmitter/receiver for the original X-Box 360 controllers
which is no longer needed.
Fantom - I do not know why this folder is here. It contains the following two files
Fantom - Unix Executable File
StartupParameter.plist
Fantom file contents:
#!/bin/sh
. "/etc/rc.common"
FantomKext="/System/Library/Extensions/Fantom.kext"
StartService() {
/sbin/kextload "$FantomKext"
}
StopService() {
/sbin/kextunload "$FantomKext"
}
RestartService() {
StopService
StartService
}
RunService "$1"
StartupParameter.plist contents
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Description</key>
<string>Fantom startup script</string>
<key>OrderPreference</key>
<string>First</string>
<key>Provides</key>
<array>
<string>Fantom</string>
</array>
<key>Requires</key>
<array>
<string>Disks</string>
</array>
<key>Uses</key>
<array>
<string>System Log</string>
<string>Crash Reporter</string>
<string>Kernel Event Agent</string>
</array>
</dict>
</plist>
~/Library/LaunchAgents/
.DS_Store 6 - I do not know what this is. It only shows up when I print the directory. I also cannot get this file to display onscreen.
com.seagate.toolkit.plist - This is related to a Lacie Big Dock.
Thanks again for your help.