If you're getting the error from the Mac OS version about the "'Desktop Sync Installer' is damaged and can't be opened", Google for "Mac OS X: App Is Damaged And Cannot Be Opened " (WITH the quotes) for the solution on a page by Andrey Sergienko. Essentially, you just need to allow downloads from anywhere in the "Security & Privacy" system preferences, then you'll be able to open it.
Nice and simple.
Works, very small, no complaints.
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