P: Can't cmd+tab to web browser (Chrome ver: 16.0.912.75) from CS6 (OSX/10.6.8)

Same issue here. This is very irritating and disrupts my workflow.

Photoshop 2015.1.2
Chrome 48.0.2564
OSX 10.11.3

Details: When I command-tab from Photoshop to Chrome, the Chrome window is visible for an instant and then the Photoshop document window is forced into the foreground on top of Chrome. Looks like a Photoshop bug to me although it doesn't happen between Photoshop and other apps or between Chrome and other apps.

The bug is getting more and more weird... Adobe, Apple, Google... Who is in charge?

Same issue on macbook pro retina 13 (2012).
Photoshop 14.2.1
Chrome 48.0.2564.109 
OSX 10.11

So I switched to OSX 10.10.5, problem disappeared.

It's also happened with Keynote. Not consistently though.

My guess. Photoshop hates presentation programs (as it should).

So maybe this and the fact that it happens also with powerpoint 2011, could point the source of the bug in direction of photoshop as well?

Yep, that works! 

In Photoshop: View menu > Screen Mode > either Full Screen mode.

I had the same issue and was driving me crazy. But discovered it only happens on Standard Screen Mode. If I change it to Full screen mode it's back to normal. 

Found another workaround. After having pressed CMD Tab and switched to Chrome (but still having photoshop on your screen) you just might add CMD < on german Keyboard, CMD ~ on english. Works for me.

Same issue here with macbook pro, el capitan 10.11.2, Chrome Version 48.0.2564.109 (64-bit), PS Version 2015.

BUT: It happens to me with Powerpoint Mac 2011 as well. As soon as I want to switch to PPT it focusses Powerpoint but still shows Photoshop File and Window.

Happens after working a while on Photoshop only. Not at first start. That's probably the reason, why many can't reproduce it.

+1 – Cmd + Tab to Chrome or click its icon in the dock, Chrome window flashes visible for a second then is hidden.

Since it only seems to affect Chrome it may indeed be a Chrome bug, although I have been able to work out a Photoshop setting that stops it from happening.

It only happens for me when Photoshop is in "Standard Screen Mode" – if it's in "Full screen with menu bar" or "Full screen" then Cmd + Tabbing works reliably just like normal.

I'm okay to work in full screen with menu bar most of the time to work around this, although doesn't help much if you're working on things with lots of open documents.