Brightness iMac in target display mode: who has it working in 10.6.8?

Question

Level 1

8 points

Brightness iMac in target display mode: who has it working in 10.6.8?

"With Target Display mode, you can use your iMac (27-inch, Mid 2010) or iMac (27-inch, Late 2009) with Mac OS X as an external display.": http://support.apple.com/kb/ht3924 . "Use the keyboard of the 27-inch iMac to adjust display brightness and sound volume and to control media playback of applications running on the 27-inch iMac in Target Display mode."

This used to work perfectly for me. But under 10.6.8, the brightness control stopped working. Sound and media control still work as expected. I posted before on this.

Now I know more people are experiencing this problem... I am looking for people who DO have it working under 10.6.8!

I'm looking for anything I can do to get it to work, maybe the info from people who have it working gives me some clues.

Lion is just around the corner. Please let me know if Lion fixes this problem for you.

Thanks!

Maarten

iMac, Mac OS X (10.6.8), brightness in target display mode

Posted on Jul 12, 2011 3:32 AM

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Answer 1

nthacker

Level 1

9 points

Jul 21, 2011 10:46 PM in response to m.s.fromNL

I had the same problem on my 27" iMac (late 2010) under OS X 10.6.8.

Sadly, upgrading to Lion still hasn't fixed the bug.

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Answer 2

m.s.fromNL Author

Level 1

8 points

Jul 22, 2011 12:22 AM in response to nthacker

Wow, that's sad to hear. If I would just get some sign from Apple that this is a known issue and what they plan to do about this... If they would just be a tad more communicative in this respect, I would be much happier right now...

Anyone got more successful stories?

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Answer 3

Jul 28, 2011 5:51 PM in response to m.s.fromNL

Sadly, not a successful story here. My iMac is 100% brightness in target display mode w/ my MBP.

The volume adjustment works, but not brightness. In fact, Command-F2 doesnt even bring me back to iMac mode right now, either. Weird.

This display's LED backlight is so bright, at 100%, its kinda hard to focus while squinting.

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Answer 4

Aug 11, 2011 3:31 PM in response to m.s.fromNL

I'm using two 27" imacs and one of them is still on 10.6.8 one has been upgraded to Lion just now.

I thought it was the Lion update which caused this issue for me because I installed 10.6.8 on both of them today as well.

Now I can't adjust the brightness in target display mode on either 27" imac.... worse that that it sets it to full brightness too.

I don't know of I want to try to go back to before 10.6.8 with time machine, talk about gutted ?

can you use monitor calibration as a work around ?

I found TS3919 but it doesn't work BTW , it says to set the brigthness before entering target display mode..

Simon

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Answer 5

Feb 10, 2012 7:20 AM in response to m.s.fromNL

Same problem to me, seems to not be resolved yet which is a problem. I bought a cable just for this feature and it is really disapointing to use :/

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Answer 6

Jan 9, 2013 6:41 AM in response to m.s.fromNL

Still not resolved in OSX 10.8.2 .. Don't think this feature will return 😟

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Answer 7

Jan 9, 2013 8:44 AM in response to Icewax_98

It has been fixed in 1.7. I'm running in 1.7.5 on my laptop and Imac 27" and I can actually set the luminosity.

I'm pretty sure I'll never upgrade regarding to the poor support of this feature.

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