Is there a fix for disappearing app windows in OS X Yosemite?

If you still have the task bar, right click on each invisible application and then Options -> [Assign to] Desktop on Display N.

1. From the application's menu bar, select

Window ▹ Zoom

Some applications don't have this menu command.

2. If an external display is connected and turned off, either turn it on or disconnect it.

3. Open Mission Control. Close all desktops except Desktop 1 by positioning the cursor over each one and then clicking the X button in the top left corner. In Desktop 1, move the missing window, if need be, so that it won't be hidden behind the Dock.

Does the problem occur while using a different, newly-created OS X user account?

[edit: the 'this' is referring to #1 and #3 of Linc Davis's post]

This does nothing to help the issue.

Note that in mission control all the application icons are present, but the windows are invisible there too. You can hover over them and get a giant fuzzy blue box (basically the blue glow effect when hovering over windows is actually solid and behind the window).

Got any other ideas?

-Spaphnucia

It's a "me too" on this one. Just started happening, and interesting to see reserpine's problem was only posted less than a month ago.

Could it be something in the latest Yosemite update that's messing us up?

Sigh... hoping for a fix but for now will try a good old-fashioned reboot.

Adam

I just updated to Yosemite and am having the exact same problems. It is crippling for me because I have to save, quit, and restart each application each time the the windows disappear. It happens to all of the applications at the same time. Need a fix ASAP.

Thanks,

Steve

iMac (27-inch, Late 2013) 3.5 GHz Intel Core i7 OS X 10.10.1

Send Apple feedback. They won't answer, but at least will know there is a problem. If enough people send feedback, it may get the problem solved sooner.

Feedback

This is happening to me a lot too (so far just Excel and Finder are doing this) and I've found a only-slightly-less-obnoxious-than-restarting-the-app workaround. It seems to be triggered when I use a hot corner to get to "Applications Windows" (control-down) from a different program. For example, here is the mission control view of my desktop before things crap out:

Then I click on another app (in this case MATLAB) and if I open up the "Applications Windows" view from there then Excel and Finder will disappear but NOT close. Here's the mission control view after the bug strikes:

I've been able to get these disappearing apps to reappear by clicking on one of them, opening up the "Applications Windows" view, and clicking it again (or pressing escape). This will reappear the OTHER disappeared app, which I can then select, enter the "Applications Windows" view, and select again to make the first one reappear. If I have only one disappeared non-Finder app I can open a Finder window, hit control-down then escape, and my non-Finder app will reappear.