I just upgraded OS X from 10.7 to 10.8.
While using 10.7 with an HP Compaq LA2405wg external monitor connected via Mini DisplayPort to VGA adapter, I was unable to set this monitor's native resolution of 1920×1200, because it was not listed in OS X's System Preferences > Displays
.
After scouring forums and SE sites, I found the application SwitchResX. With this application I was able to install a custom resolution, and then I was able to use this external display at 1920×1200 without issue for almost a year until I upgraded OS X.
After upgrading to 10.8, my custom resolution was lost. Again, the 1920×1200 resolution is not listed in OS X's System Preferences > Displays
. The highest resolution I can use (with correct ratio) is now 1440×900, which is the same as the LCD screen on the MBP.
So I fired up SwitchResX to re-install the resolution, but I am now being nagged about my trial time expiring. When I select my display on the left hand side of SwitchResX, and open the Custom Resolutions
tab, I see my resolution listed, but it always says Not installed
under the Status
column.
Since this exact same hardware configuration worked under 10.7 (with the help of non-free third-party software), it seems like I should be able to get 1920×1200 from 10.8 as well. The only software workaround I knew (SwitchResX) has expired.
Is there anything I can do with OS X to reclaim my monitor's native resolution? Or do I really have to resort to purchasing third-party software to support this seemingly common resolution?
System specs:
OS X 10.8.4, Intel Core i7, 4GB DDR3 RAM, AMD Radeon HD 6490M 256MB
Edit – Bounty Details:
I have Apple's Mini DisplayPort to VGA adapter. Their knowledge base entry about supported resolutions and refresh rates here:
http://support.apple.com/kb/ht3382#16
And the native resolution and refresh rate for my monitor is 1920×1200 @ 60Hz. You can view the manufacturer's product page here:
For detailed diagrams covering various methods of shoelacing, please refer to the following site:
Best Answer
I've had the same problems.
I think youre leaving the lid to your mac open.
If you are using an external keyboard, external mouse, and an external display, while your mac is powered, you can close the lid, hit the shift key a couple times to wake it up and I think you will see the desired resolution listed.
There is a command line solution
Get this
After you compile it by running:
you can do