The native window snapping feature on macOS is actually so bad/buggy

[2638se]

I think apple really fumbled here. For example ("Tiled windows have margins" setting is turned off),

This is what happens when two windows are snapped side by side using the native snapping feature. Notice how the left/right and bottom border of both windows are cut off while on the top there's a pixel wide misalignment between the two windows and the maximized window behind? (maybe hard to see on a glance from screenshot) And if you make one of these two windows maximize in this state this happens,

The left border is still cut off for some reason, but if you maximize again in this state the left border shows up. BTW, third party implementations of window snapping do not have these problems (of course).

Other burning problems:
1.The animation is really slow.
2.When a window is maximized with dock showing, if the dock changes its width (Apps open/close). Some windows change with it but some don't. Even first party apps are inconsistent. For example the Music app does not but the Notes and Weather app do. Finder does not if a new Tab is created after the window is maximized. It's so inconsistent. Why don't just choose one of these two?

They could have just copy windows7. But they somehow made this thing so substandard. Impressive actually......

 

[rin67630]

But they somehow made this thing so substandard

Welcome to macOS...

 

[zula]

100% agree. Get used to it though. The feature is 'finished' for at least a few years.

 

[GFS]

I'm not seeing this behaviour.

Are you Arranging windows, then moving one to see what happens with 'snapping'? If so, be aware that a window retains, in memory, it's dimensions from before it was 'Arranged'. If you move it just a little bit, it will no longer be a part of that arrangement and will go back to its original dimensions. If you are trying to 'Snap' it and there is not enough space to do so, then it won't be able to that.

 

[2638se]

I'm not seeing this behaviour.

Are you Arranging windows, then moving one to see what happens with 'snapping'? If so, be aware that a window retains, in memory, it's dimensions from before it was 'Arranged'. If you move it just a little bit, it will no longer be a part of that arrangement and will go back to its original dimensions. If you are trying to 'Snap' it and there is not enough space to do so, then it won't be able to that.

No, I do not move/resize windows manually to arrange them and I am aware that if you drag a snapped window it would return to the form before It was snapped (BTW This behaviour is also inconsistent sometimes, I think it is related to the burning problems #2). I am referring to the behavior that "Drag windows to screen edges to tile" in System Settings enables.

Somebody on reddit told me that he can reproduce the visual bug if he "Drag windows to screen edges to tile" but not with keyboard shortcuts. If you "Drag windows to screen edges to tile", can you reproduce It?

 

[GFS]

No. It makes no difference if I'm using 3-finger drag, or keyboard shortcuts, they always align correctly. However... it is a subtle process when dragging. You need to be going quite slowly around the 'zone', or else 'snapping' is ignored. It also works for me with a 2nd monitor when snapping to the edge between the two (different Spaces).

Do you have any utilities installed that affect window management or the Finder?

(There is an inconsistency in toggling windows from pre-resized/positioned to it's initial state. I find this when double-clicking the Titlebar. I've never managed to work out what effects the inconsistency or even, what it really is 🙂. This goes back a number of years)

 

[2638se]

No. It makes no difference if I'm using 3-finger drag, or keyboard shortcuts, they always align correctly. However... it is a subtle process when dragging. You need to be going quite slowly around the 'zone', or else 'snapping' is ignored. It also works for me with a 2nd monitor when snapping to the edge between the two (different Spaces).

Do you have any utilities installed that affect window management or the Finder?

(There is an inconsistency in toggling windows from pre-resized/positioned to it's initial state. I find this when double-clicking the Titlebar. I've never managed to work out what effects the inconsistency or even, what it really is 🙂. This goes back a number of years)

It's pretty obvious if the window is snapped/tiled because there is an obvious animation. I don't think one can really miss/confuse it...... tbh could not really think of anything that would interfere with window management..... I choose to believe this is an macOS problem since their window management is already so buggy as the inconsistency problem you have also experienced shows......

 

[GFS]

Well, since I don't see it (on a very clean OS) then it must be either something to do with settings, that aren't the same as yours which are invoking a bug, or it's outside interference.

Ironically, I only occasionally use this window management. I tend to Optn-drag a window corner to resize how I want and position manually, or e.g. to change height/width, Optn-double-click or drag the top/bottom/left/right edges to extend or fill vertically/horizontally, but I always have a close look at new features when they're introduced, to see if I'll like them.