MacOSX Maverick 10.9 - How do I stretch a window across both of my dual screens on my dual screen setup?

I have two monitors on my Mac. I have just installed Maverick and I notice I can no longer stretch a window from the screen on my left to the screen on my right. Mac OSX Maverick 10.9 seems to pick one screen and it does not show the stretched window on the other screen anymore.

This is a problem because I like to use one particular program (VMWareFusion) to do my software development in full screen mode. No longer can I see my guest operating system in both screens anymore when I full screen it because of this problem... at least that is my hypothesis.

Solution 1:

I haven't tested it myself, but according to John Siracusa's review at ars, if you disable the "Displays have separate Spaces" checkbox in the Mission Control preference pane, the old behavior (including ability to split a window between displays) returns.

Solution 2:

I had this same issue and I just couldn't figure out what to do. After searching and searching, I finally found out what to do and I created a YouTube video showing the simple steps. Let me know if you this is the same issue you had.

https://www.youtube.com/watch?v=pnR98GOGtng

Solution 3:

If you would like the best of both worlds you could use the third party application called SecondBar: https://www.macupdate.com/app/mac/33264/secondbar after changing the "Displays have separate Spaces" checkbox in the Mission Control preference pane