iMac 27" SSD Upgrade - Important Tip!

[EugW]

The 2010 iMac is now supported by OCLP, which allows the installation of Big Sur. I'm running it on a stock 2011 21.5 and it's great, there's the odd graphical glitch but nothing more than that. Definitely worth experimenting with if it's no longer your main computer.

Supported Models | OpenCore Legacy Patcher

Thanks for the heads up. I was not aware of that. However, I will keep the iMac on High Sierra as it still has modern browser support including Chrome along with proper browser security, and will for quite some time. (I ran into the browser security problem on my 10.11 Mac Pro on Sept. 30.)

The machine is for the kids, who will be using Google Classroom and related apps. As long as the iMac can run the latest version of Chrome, it's fine. For the near term I'd rather have a 100% stable High Sierra than a finicky Big Sur for this purpose. Perhaps in a year or two if/when the hack matures I'll consider the upgrade.

 

[EugW]

I know that temp cable is only US$8 or so, but save your money, don't waste it on that OWC (or similar) temp sensor.
Just do what many have successfully done, myself included. Very simply shorted out the HD connector with a home-made jumper wire as shown HERE. Find a piece with wire diameter (with ends stripped) that is a good snug fit in the connector female sockets and it should never come loose. I've never had a problem since.

Yes I saw that. I had read though the one difference is that if you use the optical drive temp sensor cable you’ll have a temp reading if you look for it in temp monitoring software, but if you do the short out method you’ll get a ‘null’ reading. I didn’t know if that was truly accurate or not but I figured for CAD$10 and same day shipping, why not?

I was curious to see if the drive temp shows up with that optical drive sensor, so I downloaded Macs Fan Control to check.

Confirmed. It sees the temp reading just fine using the optical drive temp sensor cable. See bottom right of picture:

 

[SujetoTacito]

The 2010 iMac is now supported by OCLP, which allows the installation of Big Sur. I'm running it on a stock 2011 21.5 and it's great, there's the odd graphical glitch but nothing more than that. Definitely worth experimenting with if it's no longer your main computer.

Supported Models | OpenCore Legacy Patcher

Hi ElCani, are you from Argentina.? Can I contact you through social networks? or maybe you can tell me which version of macOS you are currently using on iMac 21.5 of 2011..? I would like to try to update…

 

[CooperBox]

Hi ElCani, are you from Argentina.? Can I contact you through social networks? or maybe you can tell me which version of macOS you are currently using on iMac 21.5 of 2011..? I would like to try to update…

ElCani will probably be back to answer you himself, but my interpretation of his post is that he's running OS Big Sur as implied.

 

[DoctorDee]

Hi to all. I have an imac 27 mid 2011.
For the Fans speed problem: If I install a normal hard disk, my iMac will have the same issues as with ssd?

Thanks in advance.

 

[EugW]

Hi to all. I have an imac 27 mid 2011.
For the Fans speed problem: If I install a normal hard disk, my iMac will have the same issues as with ssd?

Thanks in advance.

Yes.

But it would be foolish to install a hard drive anyway.

 

[DoctorDee]

Yes.

But it would be foolish to install a hard drive anyway.

Really? the same problems?
I wanted to put a 2tb hardidisk from a mac device like airport.

 

[Nguyen Duc Hieu]

Really? the same problems?
I wanted to put a 2tb hardidisk from a mac device like airport.

If you have to ask, then yes, it will be the same problem for you.