I’ve just installed some New RAM for my Late 2012 27in iMac. Its now stuck on a blank screen. It's been like that for 25 mins. It say that when you switch it back on it may take 30 secs or more for it to initiate. Nothings happing not sure what to do ?
iMac 27″, macOS 10.15
Uninstall the upgraded RAM and then retry. Exactly what brand of RAM did you buy and where did you buy it? Most experienced users on these forums will only install either Crucial.com or Macsales.com RAM, why because iMacs are VERY fussy about using quality RAM and both vendors only supply quality RAM, have great service, offer good prices so really there is no reason to not use them. If you already did buy directly from them and used their RAM, please contact them for assistance.
Uninstall the upgraded RAM and then retry. Exactly what brand of RAM did you buy and where did you buy it? Most experienced users on these forums will only install either Crucial.com or Macsales.com RAM, why because iMacs are VERY fussy about using quality RAM and both vendors only supply quality RAM, have great service, offer good prices so really there is no reason to not use them. If you already did buy directly from them and used their RAM, please contact them for assistance.
Please return the Amazon RAM and if you are in the UK then buy Crucial.com RAM or you can find a UK distributor for OWC RAM at OWC Europe, just click the map of the UK and you will find them. NEVER EVER buy from Amazon for RAM, always buy direct!
Many Thanks for your reply. The RAM is Rasalas-uk from Amazon UK. I previously tried other brands from Amazon they did not work, I got the 3 Beep alert when I powered up. I may have bought the wrong spec RAM. I didn't the 3 Beep warning this time. I felt optimistic. You suggest I unplug and take out RAM and re-inset RAM before powering up ?
Your welcome.
Ram upgrade Late 2012, 27' iMac Stuck on Blank Screen
