How to disable automatic window snapping / resizing on MacOS 15.0 Sequoia

You might try going into System Settings > Desktop & Dock. Under the Windows subsection, Turn off feature called, "Tile by dragging windows to screen edges".

Do you happen to have an external Dell monitor? I had the same problem on a MacMini but not on two MBPs. Very strange! But I tried killing the DDPM helper utility for controlling Dell monitors, and then my window snapping issue was solved! There seems to be some clash in technology here. Both systems implement snapping, and disabling it in both places doesn't help. You have to stop the Dell app.

(If you still want to use the DDPM app, for brightness, contrast, etc, then turn on window snapping in that app. Perversely it results in no snapping!)

In addition to disabling the Tile settings, disable Stage Manager and Mission Control Spaces.

I’ve already been trying all of this options, and nothing of them works as expected.

Ok, lucky you... ;-)

In my case, a Mac Mini M2 (2023) and also upgrading from Sonoma. The 3 options outlined by @Randall_2023 (and many others in every forum I've checked) are disabled, but still the snapping happens as soon as I start dragging any window.

This "seems" to have fixed the problem. This is a "feature" in Windows but it is easy to turn off. I find it super annoying

YoHidden wrote:

I’ve already been trying all of this options, and nothing of them works as expected.

Then, perhaps the User's expectation are greater than what macOS 15.0 Sequoia can deliver.

Only and FYI for comparison purposes

Using 1 M1, 1 M2 and 1 M3 Application Silicone computers

Each were upGrading from Sonoma 14.6.1 to macOS 15.0 Sequoia

This function works as outlined by @Randall_2023

The reference to many others (posts) in every forum was not intended to weight anything, but just to state that the solution posted here using the mentioned options are the same posted in every other forum I’ve checked.

Anyway, it seems that this discussion is not going anywhere. This Sequoia feature does not work in my computer for whatever reason that I am not going to find here.

Maybe a future OS update will fix it… or not. Thanks anyway for your time.

Right after updating to macOS Sequoia my app windows began to snap to edges as soon as I click the title bar with the mouse. I've tried every guide available to try to disable this behavior, but no luck. Let me be clear, just by click & start dragging the window it immediately changes size and tries to snap to a predefined place, no matter if it moves close to a screen edge or the Alt key is being held or not.

There's no way to disable this function, and that's really annoying.

By chance, I found that the only way to move the window freely without snap activation is to hold Shift-Cmd while dragging it, but I've been unable to find where this key combination assignment in defined.

Ok, now I've also disabled the options related to State Manager and Mission Control Spaces as shown in these images, but no effect. I closed the user session and re-opened it, but no luck.

Thanks anyway.

This fix works great. Thanks Randall_2023.

I used to get annoyed with Microsoft Windows at work (always Mac at home) when a new feature was shipped enabled. Now Apple is doing this? It makes me hesitant to accept upgrades.

kiwi66 wrote:

that does not help if you want to DISABLE auto snapping

You are absolutely right

 Product Feedback - and make it known to Apple.

Maybe request they remove this new Feature introduced in macOS 15 Sequoia  

An update to this,

disabling 'drag window to edge to tile' does NOT stop window snap in 15.2, m3pro chip

This was my problem, thank you!