Android and macOS have never been the biggest friends. While Android app development is an easy feat for Apple's desktop OS, the situation is much different for simple file transfers. There is Google's Android File Transfer application, but the program is hopelessly outdated, finicky, and prone to crashes when you transfer a lot of data at a time. You don't have to rely on Google's tool for transfers, though — there are a ton of third-party apps that solve moving files between Android and macOS much better.
As a Mac user, I've felt like a pariah over the past years that I've also been using Android as my go-to mobile platform. Mac works fantastically with iOS, but Android doesn't have any powerful integration with any desktop environment. That's been the status-quo of things for as long as I remember. Android does work well enough with Windows when you're just trying to transfer some files though. But if you're on a Mac, simply plugging in the phone with a USB cable and choosing the MTP mode (File Transfer) wouldn't do the trick, you'd need a separate app called Android File Transfer (ATP) from Google to make it work.