Technically not. MacOS wouldn’t be what it is today if apple didn’t get any money out of it. They get that money from selling the hardware the software is exclusively on among other things. Let’s say i. e. Ubuntu: When it first got released then it relied on its owners personal revenue for a long time. None of the hardware sold financed Ubuntu, because Ubuntu didn’t earn money through hardware. It’s obvious that the money earned by apple through its sales also go back into macOS, because if the hardware didn’t make any money, macOS ceases to be developed as well.

With OPs logic, every software is technically free.