Yes you can if you have a old pc or laptop just flash linux and run it as a google android tv
I have a old pc and i flash that with debian and it acts like a home server as well as my android tv i can do what ever i want and watch in my tv.
And one of my friend have apple tv which is a far far better option than android tv.
Android is just a opensource platform just to build there spyware and spy on.
Edit if you have pi device and if your tv resolution is not like 4k then you maybe able to use it as a alternative but i don’t know a research needed about if that have that much house power to do so.
If you don’t want to poke into technical stuff apple tv is good.
Few years back, I had tried and had done away with foogle account on my TV, but that stopped working upon updates on apps, and OS not being updated, and few more kinds of irrelevant stuffs. However, the gist is mostly, it is not fully probable, unless some understanding company starts making one without foogle.
DivestOS has been tested booting on fugu, and you can pick one up on sites like eBay for $20-$30, although I have absolutely no idea if it actually works or what the experience is like.
I do think I removed the proprietary blob for the remote, so you’ll probably want one of those wireless keyboard/mouse combos like the Logitech K400.
You can use an launcher to get most apps to show up. However, most of it will only show up via system apps or having to go through some kind of workaround. Sorry, I m also limited in my knowledge, and hopefully someone more experienced will respond
My apologies. I should have read that it is Mac for you. For the FLauncher, it is very buggy, especially on Android 8 (mine is Oreo 8.1). It freezes a lot. I had a hard time uninstalling it yesterday.
The other 2 launchers are good. You can go with anyone of them.