Multiple process copies of your Finder Sync extension running at once is normal and expected.When I look at Activity Monitor for my app, there are almost always 2 Finder Sync exensions running. Sometimes 4 or more.I have never seen multiple extensions "run for the same menu", however. Never seen duplicated menu items due to muliple extension processes running.I would guess that your problem is rather an issue where a single extension is for some reason duplicating the menu items. Or a problem with multiple apps/bundleIDs, which would be different than multiple processes of the same Extension with the same bundleID.docs: > https://developer.apple.com/library/archive/documentation/General/Conceptual/ExtensibilityPG/Finder.html > The system may also launch additional copies of your extension whenever an Open or Save dialog is displayed. This means that the user may have multiple copies of your extension running at once, and some may be very short lived. Therefore, it’s generally best if the extension focuses on handling the badges, contextual menus, and toolbar buttons. Place in a separate service (a Login Item or Launch Agent) any code that performs the sync, updates state, or communicates with remote data sources. This approach ensures that there is only one syncing service running at a time.