Mail in Sequoia jumps to full screen

TidBITS Talk
1

A nasty result of upgrading to MacOS 15.0 is that Apple Mail repeatedly jumps to Full Screen. I am used to having Mail in a part of the screen, and when I work in another application on the same desktop, Mail all of a sudden jumps to Full Screen.
Whenever I quit Mail and restart it, it starts in Full Screen.

2

That’s disappointing. I hope there’s an easy way to fix it, or that Apple does.

3

I haven’t seen this one on Sequoia. Any guidance on how to reproduce?

4

I haven’t seen that, although I have it in a window that takes up most of the virtual desktop. I found that it’s great to have virtual desktops via Mission Control for my mail, web browser, music app, and a few more workspaces for projects. That way, I don’t need to deal with a plethora of windows cluttering the space.

5

One thing I have noticed is that if you happen to drag the top of any window to the top of the screen, Sequoia’s new window tiling behavior will resize the window to take up the whole screen (note that this is not the same as putting the app into full screen mode)

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6

Since a Mac restart this morning I haven’t seen it happen anymore. Odd.

7

Part of my personal Mac supersition is to give the device (iPhone, iPad, Mac) a reboot after 10 or so minutes after an OS update. I don’t know if it does anything but I like a clean start.

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8

Just finished the triage of upgrades last night and opened Mail. Didn’t encounter that. Did notice my Calendar now had matching colour text for the calendar event.
BTW…took “About 40 minutes” for my Ultra 2 watch to update, “About 20 mins” for my Mac Studio M2 to download, verify, install…, and “About 15 mins” for my iPhone 17.7 to upgrade to 18. My HomePod also took a bit longer than usual. But the longest wait was the watch…40 minutes was more like hour.
Glad restart resolved that Mail issue. Maybe a previous preference conflict cleaned up?

9

Same thing happens to me in both Apple Mail and Safari. Really annoying. I’ve checked settings and there appears to be no solution to fix this annoying behavior. I am running Sequoia 15.1.

I sent Feedback to Apple about this issue because it appears to be a common problem. If many others submit feedback, perhaps they’ll fix it in the next update. Go to this page and select macOS Apps>macOS: Product Feedback - Apple

11

Same problem. If I click on the screen it goes back to the correct size.

David Tuma