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Using X11 in Mountain Lion System 10.8
Mac OS X 10.8 no longer includes X-11 as an option. If you need to run software that requires X-11, you have to install XQuartz 2.7.2 or later.

You can download XQuartz 2.7.2 at http://xquartz.macosforge.org/trac/wiki/X112.7.2

[kirkmc adds: I haven't tested this. I haven't needed X11 for donkeys' years.]
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Using X11 in Mountain Lion | 17 comments | Create New Account
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Using X11 in Mountain Lion
Authored by: macavenger on Jul 27, '12 07:48:56AM

This was also the case in 10.7, unless something more has changed in 10.8 regarding this...

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Aluminum iMac 20" 2.4 GHz/3GB/300GB HD



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Using X11 in Mountain Lion
Authored by: dougmet on Jul 27, '12 08:08:30AM

@macavenger X11 was built into Lion, I never had to install xquartz.



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Using X11 in Mountain Lion
Authored by: dfbills on Jul 27, '12 08:40:10AM

xQuartz is working fine for me in 10.8 for access to the vWorkspace tools.

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-d



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Using X11 in Mountain Lion
Authored by: giskard22 on Jul 27, '12 09:32:01AM

If you try to launch an X11 application, the OS automatically directs you to download links for this software.



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Using X11 in Mountain Lion
Authored by: afranz on Jul 27, '12 09:44:07AM

X11 is simply not installed by default, the first time you use an application that requires X11 the OS will ask you if you want to install it.
Over the past few years I have used XQuartz over Apples X11 because Apple was always a bit behind the X11 version. The problem with XQuartz is that you need to re-install it every time there is an update to the system software. When I switched to 10.8 yesterday all I did was re-install XQuartz and all works fine.



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Using X11 in Mountain Lion
Authored by: xrelaht on Aug 06, '12 10:37:44PM
I wonder if the reinstall thing is still true. Apple's own support page now says to use XQuartz if you want X11, and says they contributed to the latest version. Maybe that means it will get auto updated along with everything else in the future?

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Using X11 in Mountain Lion
Authored by: cpragman on Jul 27, '12 05:35:23PM

Works as described.
Fink refused to work for me until I did this



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Using X11 in Mountain Lion
Authored by: philostein on Jul 27, '12 06:48:56PM

Anyone got Gimp working with this? It asks 'Where is X11?'

I've installed XQuartz, and I have Gimp 2.8.0 from gimp.lisanet.org.



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Using X11 in Mountain Lion
Authored by: Sven G on Jul 31, '12 03:47:55AM

As I said on the other post, simply select XQuartz - after having (re)installed it - in the Utilities folder, relaunch the Gimp, and everything should work again.

BTW, a new Gimp for build Mountain Lion is now available from the developer's website:

http://gimp.lisanet.de



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Using X11 in Mountain Lion
Authored by: Sven G on Jul 31, '12 03:51:35AM

Of course: *in the other post*; *a new Gimp build for*; sorry for the typos...



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Using X11 in Mountain Lion
Authored by: philostein on Jul 31, '12 04:12:53AM

Cheers, worked great!

I just needed to 'Browse' away from the provided app list after launch Gimp, and click on XQuartz in /Applications/Utilities.



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Using X11 in Mountain Lion
Authored by: ctapley on Jul 27, '12 07:22:48PM

I do still use X11 frequently.
This works as described. I loaded up the new version of X11 and was back online in about 10 minutes from completing the move to the new version of OS X.



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Using X11 in Mountain Lion
Authored by: afb on Jul 27, '12 08:52:51PM

Is there any benefit to installing X11 through macports instead?



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Using X11 in Mountain Lion
Authored by: rumpoleon on Jul 28, '12 02:11:36AM

This surprised me last week when I upgraded, because no report had mentioned this. However, I can report that so far, it works perfectly on all apps I've tried that relied on X11 (e.g., MATLAB 2012a).



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Using X11 in Mountain Lion
Authored by: Sven G on Jul 29, '12 11:31:50PM

BTW, if you upgraded from Lion to Mountain Lion and already had XQuartz installed, you must reinstall it, from the link above: this will also remove the old X11 app, leaving only XQuartz, as if it were a "clean" Mountain Lion system.

When I launched the Gimp, there came up a window asking where X11 was: I just selected XQuartz in the Utilities folder, then relaunched the Gimp, and everything is now working.



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fvwm2 in Mountain Lion
Authored by: mzp3769 on Aug 12, '12 07:26:11PM

Hello,
In earlier Macs clicking on X11 in dock used to open a new 'screen' where I could run window manager like fvwm. This no longer happens. Is that fixable? Has anybody been successful with running an X11 window manager in Mountain Lion?
Thanks,
Mark



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Using X11 in Mountain Lion
Authored by: softweyr on Nov 26, '12 12:36:37PM

@mzp3769: The "window manager" is the Mac OS window manager; the XQuartz display uses the Mac display as the X root window.

I installed XQuartz after my Mountain Lion upgrade, loaded and started the plist, and everything works. (I hate reboots.) I don't even have to run xterm; X applications start just fine from the OS X Terminal.app now. Beautiful. I mostly use X to run Eclipse and SlickEdit from Linux development hosts, and X over ssh is working perfectly, from Terminal.



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