Well you have not told us the display model or its native resolution so it is hard to guess. Is the resolution on the Dell display set to the display's native resolution?
If so maybe your adaptors are not working or maybe your display is not working correctly. Try the computer with another display. DVI should result in a better display than VGA.
I've a 2011 MBA, 2008 MBP and a Dell U2410 24" 1920x1200-native setup with zero problems, until I replace the aging MBP with rMBP. Now I get the same issue as the OP.
I've searched extensively, but "blurry images, washed-out colors, smudgy text" isn't very scientific/concrete so it's not easy to have a clear-cut case. On this same issue (I believe), I've found the following threads:
I'm trying to document the issue as much as possible, with photos taken off the display. (I've found screen capture doesn't work). They're posted at http://goo.gl/XLdMf
- The same mini-DP to DP cable is used to connect MBA, rMBP (and my previous 2008 MBP) and have been in service since I've the Dell. No issues at all, except the rMBP.
- I've tried HDMI-HDMI from rMBP to Dell. Same lousy display quality.
- The Dell U2410 accepts DP, HDMI, DVI and VGA inputs.
- On the monitor itself, I can press a few buttons to ask for display info. In both cases, the Dell reports it is displaying in 1920x1200 @ 60Hz. (So this rules out the problem of trying to display 1920x1080 on a 1920x1200 native display).
- I've done a Factory Reset on the Dell, to no avail.
- When the MacBookAir4,2 (2011 MBA) is connected, a range of resolutions is available:
- 1080p, 1080i, 720p, 480p, 1920x1200x 1600x1200, 1600x1000, 1344x1008, 1344x840, 1280x1024, 1280x960, 1280x800, 1024x768, 1024x640, 960x600, 800x600, 800x500, 720x576, 640x480
- When MacBookPro10,1 (rMBP) is connected, only 3 choices present itself:
- 1920x1200, 1600x1000, 1280x800
- Comparing the 2 Colors tab photos, notice how, when the rMBP is connected, the fonts have a white shadow all around the black fonts.
- Comparing the 2 Display tab photos, look at the "1920" in the selected "1920x1200" option. Notice how, when the rMBP is connected, the bottom of the "1", "9", "2", "0" are smudged together
Thank you thank you. Nice to know I'm not alone, even though we don't have a solution yet.
There are other threads about similar problems - especially the HDMI->Dell, but some posters report that using DVI instead of HDMI fixes it for them.
For me, I have been able to try VGA and DVI (only) and both have this problem.
Hi Ivan, I'm speaking to Apple right now and hopefully I will have an answer soon! I went through 2 stages of technicians and they want me to email a case and they'll throw it onto a bigger technician to see if they can resolve it... bore...
I'm using the 15" MBPr and a Philips 231E monitor and checked out ur photo's and I've got the same issues.
It could be the difference between the Retina Displays PPI and the dell displays PPI. Some external monitors will have an auto-adjust button that will force the monitor to look for a suitably clear solution. If this still doesnt work, play with the resolution of the external screen. The problem could be that you are sending a resolution smaller (or larger) than the external screen. I would also suggest trying it with an HDMI cable (which basically just transmits data, instead of a signal. If that still doesnt work, try this:
Resetting PRAM and NVRAM
- Shut down the computer.
- Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
- Turn on the computer.
- Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
- Hold the keys down until the computer restarts and you hear the startup sound for the second time.
- Release the keys.
Thanks for the reply ComputerFixer, I am in fact using a HDMI cable, I tried to change resolution to make sure it matches my monitor's native resolution by pressing Option and clicking on Display Preferences (instead of accepting the Best for Retina option), the resolution matches.
I will try PRAM and NVRAM procedure, thanks.
ComputerFixer, just tried to reset the PRAM and NVRAM as you have suggested, unfortunatelly didn't solve the problem ... using the same monitor on Mac and Windows is night and day ( Windows 100% better ), crispy fonts and images... Mac, blurry.
I also went to see a Genius (took my monitor) but no luck...