Yet another random freeze and reboot thread

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Level 1

9 points

Yet another random freeze and reboot thread

Hi all - 2015 27" iMac. Just took it to Mactronics in Austin, passes the Apple deep dive diagnostic. I get a clean install of Big Sur, nothing else on the computer, no pictures, no music, no apps except for Firefox. NADA. I set it up as if it was brand new.

After being on for about 24 hours it has the random freeze and restart issue I took it in for. 3 times in a row.

Any idea ( AGAIN) what's happening, memory issues maybe ? Take it out and try a different brand ? Go back to Catalina and try that ?

Thanks

Posted on Oct 22, 2021 9:00 PM

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Answer 1

Top-ranking reply

Jack-19

Level 8

46,020 points

Oct 22, 2021 9:24 PM in response to roundbadger

Follow these steps: How to use the Add Text Feature When Post… - Apple Community.

Also, you can go to the Apple Menu () > About This Mac > System Report > Memory, then look for "Manufacturer".

Jack

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Answer 2

Jack-19

Level 8

46,020 points

Oct 22, 2021 9:02 PM in response to roundbadger

Welcome to the Apple Support Communities.

I believe we need to proceed with an EtreCheck report. EtreCheck is a useful App to diagnose and identify issues, both hardware and software. It is trusted by many users. Please follow the steps outlined below:

Navigate to: https://etrecheck.com and get the free version of EtreCheckPro.
Download it. It is a free and trusted app. It is often recommended here on Apple Support Communities.
Open EtreCheck, and before running the report, be sure to check “Allow full Drive Access” at the bottom of the EtreCheckPro window.
Run the report, and put it in a post, as seen here: https://discussions.apple.com/docs/DOC-250000211. We will then examine the report for issues in your Mac.

Also, what brand of RAM is currently installed?

Jack

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Answer 3

roundbadger Author

Level 1

9 points

Oct 22, 2021 9:09 PM in response to Jack-19

Ha !! I figured you'd have me do that. I don't know the brand, I got this from a friend who works at Apple and I don't believe he ever had this issue with it. Mactronics might remember when I talk to them on Monday

Let me start that etrecheck download...

Thank you

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Answer 4

roundbadger Author

Level 1

9 points

Oct 22, 2021 9:36 PM in response to Jack-19

Size: 4 GB

Type: DDR3

Speed: 1067 MHz

Status: OK

Manufacturer: 0x802C

Part Number: 0x384B54463531323634485A2D314739453220

Serial Number: 0x65001423

BANK 0/DIMM1:

Size: 8 GB

Type: DDR3

Speed: 1067 MHz

Status: OK

Manufacturer: 0x00

Part Number: -

Serial Number: -

BANK 1/DIMM0:

Size: 4 GB

Type: DDR3

Speed: 1067 MHz

Status: OK

Manufacturer: 0x802C

Part Number: 0x384B54463531323634485A2D314739453220

Serial Number: 0x65001423

BANK 1/DIMM1:

Size: 8 GB

Type: DDR3

Speed: 1067 MHz

Status: OK

Manufacturer: 0x00

Part Number: -

Serial Number: -

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Answer 5

Jack-19

Level 8

46,020 points

Oct 22, 2021 9:46 PM in response to roundbadger

"0x802C" indicates Micron RAM. You only ever want Apple, Micron/Crucial, or OWC RAM installed.

However, on the other RAM modules, "0x00" is listed. This is not a valid manufacturer code, and the part number is missing. I suspect this may be an issue. However, let's see the EtreCheck report as well.

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Answer 6

roundbadger Author

Level 1

9 points

Oct 22, 2021 9:28 PM in response to Jack-19

report

ok, I think i figured it out. Reading instructions helps :-)

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Yet another random freeze and reboot thread

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