HELP ME FIX MY MAC PRO! Colored lines and pixels galore!

Is this a 15-in MacBook Pro?

early 2013 ? or late 2013 ? or something else?

Looks like your graphics card has fried, time to get another one.

Same thing happened to mine 18 months ago.

Since the OP says i5 it must be a MacBoo Pro.

However, per

https://en.wikipedia.org/wiki/MacBook_Pro

there was no 2.66 GHz 2008 models but there was an early 2009 and mid 2010 that all have 1066 MHz memory

How to identify MacBook Pro models - Apple Support

It appears you have a graphics hardware problem. Some 2010 had a problem

MacBook Pro (15-inch, Mid 2010) intermittent black screen or loss of video Quality Program has ended - Apple Support

As suggested, likely its the graphics card; and that would require a replacement.

The reason why several inquiries about your product, is that so many items posted

here in Mac Pro (desktop) are mis-placed and actually are users of Mac(Book) Pro

users who continually misidentify their product. I've asked dozens of those be re-

located to their appropriate ASC discussion section. Some never are.

So a diagnostic by a trained AASP to be sure is one advisement.

In any event...

Good luck & happy trails! 🙂

what update was available for a 2008 mac months ago that you ran?

it appears you have an imac not a mac pro, Mac Pros's did not have an option for an i5 in 2008.

Your GPU or the drivers may be damaged and I suggest you run the diagnostic disks that came with your computer to determine if a problem can be isolated.

if you have a backup I would consider restoring to the OS that shipped with your computer from the original disks that came at the time of purchaser and seeing if the issue is resolved. If it is the problem does not occur in the previous OS the issue is faulty drivers, if not the problem could be hardware related.

Be sure to correctly identify your product with some detail before attempting to

seek assistance or opinion about the status of a specific product. You may be

able to find out exactly what week/month/year and build version of your Apple

product from third-party web site, by serial number. Don't post the number here.

• Mac Serial Number Info - Lookup Your Apple Serial Number:

https://www.powerbookmedic.com/identify-mac-serial.php

So far I've been able to tell by the image posted, the item was not a portable Mac

because of the display; however that looks like an Apple Display, not MacBook/Pro.

However the iMac also does look like a standalone Apple display, too.

This discussion has now been moved at least twice. So help us in being overly

detail conscious such as information from http://mactracker.ca can provide. Or

additional info such as http://everymac.com has about each build model Mac.

Good luck & happy computing! 🙂

Colored stripes in the picture at startup on an iMac is an indictment of the screen memory.

Unfortunately, the screen memory on these models is likely to be special VRAM soldered onto the mainboard. This means replacement would be done by replacing the mainboard, an expensive proposition out of warranty.

An appointment at the genius Bar can provide a free evaluation, in warranty or out, and can provide an estimate of the cost as well. Be sure to ask whether it would be eligible for depot repair, which takes a little longer but is sometimes far less money. In depot repair, they will usually fix everything on your complaint laundry-list for one comparatively low price.

So as you incorrectly identified your iMac as a MacPro, it is a different kettle of fish.

i would recommend getting a genius appointment at your nearest Apple Retail Store

and getting a quote there.

I have a 2008 MacPro and graphics card replacement is a lot easier on that.