Mac OS forum


Graphic Problems in OSX El Capitan with iMac 27"

by cvietta / December 9, 2015 5:25 AM PST

Hi, I suddenly have strange Graphic problems with my iMac. During working it started all of a sudden to display all system panels scrambled or black. System panels in the finder but as welll the dock and system bar. The problem kept staying after restart and logging in as new user. When I start in "safe mode" everything is displayed fine. I once booted regulary and the problem was gone just to reappear after a few minutes. I think this indicates that is rather a software thing.
HELP, I don't know what to do there a solution despite installing everything new?

3.06 GHz Intel Core 2 Duo, 12 GB 1067 MHz DDR, ATI Radeon HD 4850 512 MB, OSX El Capitan, 10.11.1

Here a Screenshot:

Discussion is locked
You are posting a reply to: Graphic Problems in OSX El Capitan with iMac 27"
The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to our CNET Forums policies for details. All submitted content is subject to our Terms of Use.
Track this discussion and email me when there are updates

If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.

You are reporting the following post: Graphic Problems in OSX El Capitan with iMac 27"
This post has been flagged and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.
Sorry, there was a problem flagging this post. Please try again now or at a later time.
If you believe this post is offensive or violates the CNET Forums' Usage policies, you can report it below (this will not automatically remove the post). Once reported, our moderators will be notified and the post will be reviewed.
Collapse -
Clarification Request
have you tried a lower resolution setting?
by James Denison / December 9, 2015 5:32 AM PST

see if it does the same thing?

Collapse -
cant change resolution
by cvietta / December 9, 2015 6:15 AM PST

can't really do since the system preferences are all black and not visible

Collapse -
(NT) Not even in "safe mode"?
by James Denison / December 9, 2015 6:18 AM PST
In reply to: cant change resolution
Collapse -
change of resolution
by cvietta / December 9, 2015 7:50 AM PST

I managed to change the resolution now. In the normal mode with the graphic glitches the display turnes black. In the safe mode it perfectly changes the resolution and back...

Collapse -
While in safe mode
by James Denison / December 9, 2015 8:06 AM PST
In reply to: change of resolution

reload the software drivers for your video card.

Collapse -
reload software drivers
by cvietta / December 9, 2015 8:12 AM PST
In reply to: While in safe mode

Hello James, thanks a lot for your help. With reloading you mean downloading again and install them?

Collapse -
(NT) yes
by James Denison / December 9, 2015 11:04 AM PST

All Answers

Collapse -
4850 is well how do i put this?
by R. Proffitt Forum moderator / December 9, 2015 8:59 AM PST
Popular Forums
Computer Newbies 10,686 discussions
Computer Help 54,365 discussions
Laptops 21,181 discussions
Networking & Wireless 16,313 discussions
Phones 17,137 discussions
Security 31,287 discussions
TVs & Home Theaters 22,101 discussions
Windows 7 8,164 discussions
Windows 10 2,657 discussions


Help, my PC with Windows 10 won't shut down properly

Since upgrading to Windows 10 my computer won't shut down properly. I use the menu button shutdown and the screen goes blank, but the system does not fully shut down. The only way to get it to shut down is to hold the physical power button down till it shuts down. Any suggestions?