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Not sure about any of the newer ATVs, but people have been turning the original ATV into a Mac for years.
 
I am curious abut this too. Apple obviously will never allow this to happen, but it is an interesting thought experiment.

The A12 is a decent processor, similar to the 2020 Intel MacBook Air, for example.
4GB RAM isn’t a lot, but macOS can run on 4GB even on Intel, so it should be doable.
64GB SSD is very limited, though for many users it could be enough for macOS and your apps, keeping the rest in iCloud.
You can add a monitor with HDMI and keyboard and mouse via Bluetooth.

If you look at it like this, while it would be a limited computer overall, it would still be a fantastic deal at just $199. Add a USB-C port and a 128GB option for $299 and it would be a fine computer for a lot of people, especially in school environments. Which is why Apple will never sell it of course (better sell Mac minis and iMacs with bigger profit margins).

Or do you think I miss something which would make this impossible from a technical point of view?
 
If Apple wanted to scavenge the Mac Mini market, they would have given us Safari and FaceTime in TVOS.

The M1 is just an evolved A14. Obviously the A12 could run MacOS, but what's Apple's motivation to do so?
 
If Apple wanted to scavenge the Mac Mini market, they would have given us Safari and FaceTime in TVOS.

The M1 is just an evolved A14. Obviously the A12 could run MacOS, but what's Apple's motivation to do so?
I know, it’s just a thought.

I do sometimes wonder to what extent innovation is hampered by a company’s need to make profit. For example, Apple could perfectly make an iPhone docking station which you connect with your display, keyboard and mouse (assuming the iPhone would have USB-C). Once you put your iPhone in the docking station, it would boot in macOS and you have a fully capable computer. A USB-C-equipped iPhone 12 Pro with 6GB RAM and 256GB storage would be a perfect computer for most people if you could connect it to a display, keyboard and mouse and boot in macOS. Heck, older iPhones would probably be fine as well. But Apple will never do it, because they prefer to sell you Macs as well. Similarly, they won’t make a Lenovo Yoga-style MacBook, because they still want to sell you iPads. And so on.
 
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