Screen freezes and some rectagles cover all the screen, sort of greenish and violet

[rijadferati]

I use mac with both windows and mac os, the problem seems to persist only in mac os x while booting in windows seems to work just fine.
Screen freezes and some rectagles cover all the screen, sort of greenish and violet, after i restart they are gone, but then they appear again. Unless I login to windows where the screen is perfectly normal.

please help me fix the issue.
I dont think its a hardware issue, since it only shows after the system is started up, the grey screen is good also it works flawless in windows.
PLEASE HELP ASAP.

 

[harryb2448]

And this on a what running which operating system?

 

[ferrarr]

Maybe you could tell us about the Mac in question?

Type/model and model year?
Mac os x specific version?
Any attached devices, monitor, drives, keyboard/mouse?

 

[chscag]

Welcome to our forums.

Hate to tell you this, but it sure looks like a hardware error. However, before we get into details we need:

Year and model of your Mac. This is important especially if your Mac is a MacBook Pro with dual graphic processors.

Which version of OS X you're running.

 

[ferrarr]

And, if it is a portable, what screen size?

 

[badshoehabit]

Looks like scrambled video which indicates a serious problem with your graphics card (been there, done that, loads of repairs, new machine x2). There is a free repair programme but it depends what Mac you have. https://www.apple.com/uk/support/macbookpro-videoissues/

 

[rijadferati]

Looks like scrambled video which indicates a serious problem with your graphics card (been there, done that, loads of repairs, new machine x2). There is a free repair programme but it depends what Mac you have. https://www.apple.com/uk/support/macbookpro-videoissues/

Type Model: Macbook pro mid 2012 13inch
Mac os X Sierra, also bootcamp installed with windows 10
SSD 240GB
No attached devices.
The issue happens only when logged in mac.
Here are some quick infos in the screenshots.

 

[Gandalph]

Looks like a Graphic Card error to me.

 

[harryb2448]

One thing I may suggest is the BootCamp partition is too small. Anandtech recommend at least 25% free space on the SSD for it to work efficiently and yep sure looks like a gfx mixup.

Read 'Don't fill Then to Capacity':-


http://www.howtogeek.com/165472/6-things-you-shouldnt-do-with-solid-state-drives/


Further Apple has a recall on some 2011 MBP and 2012 MBP experiencing gfx problems. Check this out but don't leave it:-


https://www.apple.com/au/support/macbookpro-videoissues/