iMac memory upgrade

Question

PhillHunter Author

Level 1

4 points

iMac memory upgrade

Why is my iMac beeping and will not start after installing additional memory.

iMac, iOS 12.0.1

Posted on Nov 5, 2018 7:46 PM

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Answer 1

Best reply

babowa

Level 9

78,109 points

Nov 5, 2018 8:11 PM in response to PhillHunter

Ok, so what year (or exact model) imac do you have? If you will tell us that, we can post a link to the correct spec RAM for that particular model. As for the old card not working - maybe you did not seat it exactly right.

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Answer 2

PhillHunter Author

Level 1

4 points

Nov 5, 2018 8:29 PM in response to babowa

Thanks, I have rechecked, it is definately late 2009, PC3-8500 Install memory in an iMac - Apple Support I will just have to keep trying or take it to someone or upgrade, Thanks to everyone for your input.

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Answer 3

babowa

Level 9

78,109 points

Nov 5, 2018 8:48 PM in response to PhillHunter

Ok, if it's a late 2009 iMac, then you better re-check things as that does not appear to be compatible with Mojave (which would eliminate the RAM problem):

https://support.apple.com/kb/SP777?locale=en_US

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Answer 4

babowa

Level 9

78,109 points

Nov 5, 2018 7:49 PM in response to PhillHunter

Well, that usually indicates that there is a problem with either the RAM or the slots; so, did you seat it correctly? Is it the correctly spec'd RAM for your Mac?

FWIW, what OS are you on? You are NOT running iOS on an iMac.

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Answer 5

PhillHunter Author

Level 1

4 points

Nov 5, 2018 8:18 PM in response to babowa

Thanks, I will swap them around the other way and keep trying. I got the RAM spec from the Apple Support site, It has all the same numbers on it as the original except for the memory size. I have a late 2009 27" iMac and up until now all my OS upgrades have been fine until Mojave.

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Answer 6

PhillHunter Author

Level 1

4 points

Nov 5, 2018 8:55 PM in response to babowa

Exactly right thank you, I found my slots were very stiff and I had to push harder, more force than I would have thought necessary. All working now but still not good enough for Mojave, it must be my processor is not good enough.

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Answer 7

Niel

Level 10

727,163 points

Nov 5, 2018 7:50 PM in response to PhillHunter

It wasn't installed properly, or is the wrong type, or there's a problem with it or the slots.

(165725)

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Answer 8

Nov 5, 2018 7:51 PM in response to PhillHunter

Sounds like the additional memory doesn't meet the needs of your Mac.

Where did you get it from?

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Answer 9

PhillHunter Author

Level 1

4 points

Nov 5, 2018 7:56 PM in response to babowa

I have High Sierra, I tried to upgrade to Mojave but received a message that I was unable, that is why I decided to upgrade from 4g to 8g.

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Answer 10

PhillHunter Author

Level 1

4 points

Nov 5, 2018 8:00 PM in response to Allan Eckert

eBay, after making sure it was the right one.AU 8GB 2x4GB PC3-8500 DDR3-1066 204pin MacBook Pro Mid 2010 iMac Mac MINI Memory | eBay

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Answer 11

Niel

Level 10

727,163 points

Nov 5, 2018 8:03 PM in response to PhillHunter

That module is too slow for any iMac model capable of running Mojave.

(165726)

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Answer 12

PhillHunter Author

Level 1

4 points

Nov 5, 2018 8:05 PM in response to Niel

I removed the new and left the old in original position and start up was ok. I did "About this Mac" then "System Report" and "Memory" and it showed only one of my original 2g cards was working.

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