Yes! This Mac version sucks. It's so damn fiddly. Let's say I want to put Safari and Mail side by side, but they're not on the same space. So I "Click-Hold-Pause-Drag the Green button" (seriously wtf already) and move it to the left or right side, and it says "No Available Windows". And then you're stuck. You can't swipe up, left or right, you can't go into Mission Control. You're frozen in this "No Available Windows" half-split view thing. You have to CLICK to get out of this mess. I mean seriously. What?? There are plenty of available windows! They're just not on this space! Why does that prevent me from putting them side by side? Why can't it just offer a view of all open windows on the entire system? Also when it says "No Available Windows", at least let me go into Mission Control to go and get those windows.
Then you go into Mission Control and try to do it from there. You Swipe Up, Drag the current window Up and try to fiddle it between two Spaces thumbnails. It does nothing but you have to "believe in the force" or something, because when you let go it goes full screen. Then what? You still have to find the other window you want to put beside it. So now you're swiping left and right trying to find the stupid other window. Since now going into Mission Control doesn't let you see all your windows at once, you can only see the ones on the current space unless you move the mouse to the top, so it's much harder to figure out which space the window I'm looking for is on. Wow. I wonder what's next, this can't possibly get much worse! I'm sure Apple will find a way to make it suck even more.
Seriously this and Full Screen S-U-C-K-S so hard I can't see myself using it. It's faster to just switch spaces more frequently or put windows side by side the old fashioned way. Why don't they just make it good? How hard is that?