Megastructures: Never clear why I can't build some

[aquaricorn]

The internet says I should see a tooltip as to why I can't build a megastructure or not, but I'm not seeing any (Mac, 2.2.7 build I think). I can never figure out where a dyson sphere goes (even similar-class stars, with no stations built: one allowed, the other did not). I don't know what's required for an art installation (Megacorp DLC), or why some black holes allow the Matter Decompressor and other's don't. Ringworlds seem to be the only ones I can easily build.

I even tried the command console cheats and can't force a ruined dyson sphere in on stars.

[Elitewrecker PT]

You can only build one Dyson and one matter compressor

[Red Dox]

I also strugle every game. Sometimes it is a mining station over the star, sometimes it seems to depend on what type of star, then of course the "no habitable planets around" mockery and of course the always popular "no more then one build/upgrade at a time".
Rightclicking the star for megastructure and see what is said in that tool tip is most times more useful then the generic megastructure button from your construction ship.

Just deal with that ♥♥♥♥ until they finally fix it for good. Afaik they try to pin it into the next bigger update
https://forum.paradoxplaza.com/forum/index.php?threads/stellaris-dev-diary-143-changes-to-megastructures.1166479/&sdpDevPosts=1
so probably May or June I would guess.