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모델 A1312 / Mid 2011 / 2.7 & 3.1 GHz Core i5 or 3.4 GHz Core i7 Processor, ID iMac12,2

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How can I fix my mid-2011 27" iMac?

Hello!!

I’m trying to fix/upgrade my parent’s computer. A few years ago it started having issues that I presume are a virus, and they want to replace their computer.

But I want to try and fix it before they do. (It runs these “installers” that make it impossible to use, overloads the computer so it becomes very slow)

We’ve tried everything to fix it and Apple has no clue, so I thought I’d give it a shot. The best option seems to be to replace the hard drive, which likely contains the virus, and see if that helps. I also want to upgrade the RAM since it’s pretty low and it will help the performance.

Does this seem like the best plan of action? If so, what should I replace the RAM and hard drive with to make sure they can use it? Also, should I upgrade anything else?

Thanks!!

Systems stats:

  • mid-2011 27”, running High Sierra 10.13.6
  • 2.7 GHz core i5
  • 4GB 1333MHz DDR3 RAM
  • AMD Radeon 6770M 512MB
  • 1TB SATA HDD

Update (06/11/2020)

@danj looking at the activity monitor, when the computer is loud, lagging, and slow, it looks like this--not my photo but its the same issue.

Block Image

https://discussions.apple.com/content/at...

Update (06/11/2020)

after hours of work and calls with Apple, the computer is fixed! it had viruses called “cleanmymac”, “pcvark”, “genieo”, and one other. now for upgrading!

답변되었습니다! 답변 보기 저도 같은 문제를 겪고 있습니다

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Can you explain what 'Installers' you have running. Are these going off on there own or when you open the Apps Store?

OK, let's kill off this Installer processes and delete the installer file. Clearly its a Malware type of app.

While 4 GB is on the thin side your system should still run, as the system will leverage your drives space as virtual RAM. In this case its not the fastest VRAM as its a HDD Vs a SSD. And I'm sure the drive its self is quite fragmented which is a common issue with patter drives (HD's) which are both drives..

@danj unfortunately whenever I kill the installers using force quit, they just come back in a few hours. Apple has no clue how to fix it either

Let's do this first open Disk Utility see what disks you have, I think you may have a few installer volumes listed delete them.

Then, you'll need to open a fresh finder window and search for the word 'installer' to delete the physical file.

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I am pretty sure that a factory reset will do the trick. This erases the entire hard drive, and reinstalls a brand-new copy of macOS. Beware, however, this will remove all files and apps off of the disk. You might want to back up first.

Use this guide: https://www.howtogeek.com/186860/how-to-... to boot into macOS Recovery Mode, erase the disk using Disk Utility, and reinstall a copy of macOS. Here is basically what you have to do:

  1. Shut down the Mac
  2. Press the Power button, before you hear the chime press Command (Windows button on a PC keyboard) and R at the same time until you see the Apple logo.
  3. You should see a menu that says “Mac OS Utilities”, click on “Disk Utility”, select the internal (top) hard drive, and click Erase. Continue knowing that ALL DATA ON THE DISK WILL BE ERASED. You should have a back up.
  4. X out of Disk Utility, and click Reinstall MacOS. Follow the steps and click the new hard drive when asked where to install.

# It should start installing. It should take anywhere between 15 minutes to an hour. You may or may not need to be connected to the Internet.

If you get a SMART Disk error, the hard drive is dead and you will need to replace it. Otherwise, this should be completely free.

This all should take care of the viruses and give you a fresh start, however if it’s still too slow I will link some new parts for the iMac (plus some extra tools). However you might be able to find a better deal somewhere else.

NEW HARD DRIVE: iMac Intel 21.5" and 27" (Mid 2011) SSD Upgrade Bundle

NEW RAM: iMac Intel 27" EMC 2429 (Mid 2011) Memory Maxxer RAM Upgrade Kit

Let me know if you have any questions, or if something doesn’t work. Have a nice day!

iMac Intel 21.5" and 27" (Mid 2011) SSD Upgrade Bundle 이미지

상품

iMac Intel 21.5" and 27" (Mid 2011) SSD Upgrade Bundle

$129.99

iMac Intel 27" EMC 2429 (Mid 2011) Memory Maxxer RAM Upgrade Kit 이미지

상품

iMac Intel 27" EMC 2429 (Mid 2011) Memory Maxxer RAM Upgrade Kit

$179.99

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thank you so much!! I'll try this and let you know if I have any issues. I really appreciate it!!

@savvy w Sure! Glad I could help!

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Since the person above me already explained the answer to the first question, I will tell you how to install the RAM

  1. Power down, unplug and lay the mac face down on a surface that will not damage the display
  2. Using a Philips head screwdriver remove the cover on the bottom of your mac
  3. Remove the straps or levers holding the RAM in place
  4. Carefully remove the RAM sticks
  5. Insert your new sticks of RAM
  6. Return the straps or levers to proper position
  7. Return the cover to its proper location and secure it with the screws
  8. Return the mac to it’s original position and power it on to test it

If you want to do a CPU, GPU or drive upgrade I can also help you with them

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savvy w 가/이 대단히 고마워 할 것입니다.
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