I've been moving towards Amplitude for analytics in my personal apps, since it seems to have the best user experience and easiest itegration vs Google Analytics and Mixpanel (plus, it has a free tier!), but I only recently implemented analytics in a macOS app. It was a bit tough to figure out how to pull in Amplitude, since (as far as I can tell) their documentation is iOS-specific. If you try to install the Amplitude-iOS pod in a Mac app, you're going to have a bad time.

Luckily they're publishing another podspec which correctly sets the macOS deployment target. Integrating Amplitude into your project is as easy as:

pod 'Amplitude'

(This post isn't sponsored by Amplitude, it's just the best solution I've found for tracking usage of my personal apps.)