Chris Hauk, MacTrast:

You can, in fact, make phone calls from your Mac. Wi-Fi (WiFi) calling is one of the perks you get when you choose to go with Apple’s complete eco-system. If you own an iPhone 5c or newer devices and one of the “Wi-Fi Calling” compatible devices (Mac, Apple Watch, iPod touch or iPad), you’re one step closer to making what Apple named “Wi-Fi calls on other devices.” It’s imperative that all your devices are properly registered under one Apple ID connected to one iCloud account.

If you own a Mac and an iPhone, this is worth setting up. It may already work and, if not, getting this to work may solve some other problems for you.

I actually prefer the audio quality of calls on my Mac. I find the sound subtle, nuanced when compared to my iPhone.