How to install Mac OS Sonoma on Legacy iMacs, 2012 iMac Running Sonoma. OCLP tutorial •

In this video I will show you how to install the latest Mac OS Sonoma on a 2012 iMac
Step one Download OCLP for Mac
Follow along with this video to finish the install.

***USE CAUTION***
Honestly Sonoma runs like crap on this particular machine iMac 2012, your results may vary but Sonoma really pushes the limits of your graphics card, this 2012 on has a 512Mb graphics card and it idles at about 75% capacity at all times and Target display mode does not work.

I also installed it on my 2013 iMac and it did fare a little better but it has a 4GB graphics card and Sonoma was running a fair amount of it at all times.

Big Thanks to @mrmacintosh and OCLP Team!!

Create Mac OS Sonoma bootable USB

How to download Mac OS Sonoma

[Wiganview]

I've been running OCLP and Sonoma on my late 2012 27" iMac i7 quad core 3.4 24gb ram and 512 ssd GTX 675MX 1GB runs like a dream, and because OCLP updates too the Apple updates all go on without any issues. TBF I never thought I'd still be using this old Mac in 2023 with all the latest software but it just does it, saves me a fortune on the new apple kit. With a limited budget for future upgrades this OCLP software is absolutely brilliant. If this Mac ever breaks I would probably buy another same spec 2nd hand and do the same again.

[DominikSte]

Thanks for the video. I installed macOS Sonoma on my 2013 MacBook Pro and 2012 MacBook Air and it runs really great.

[kennorkin]

Thanks for the video. I have a 2012 iMac dead-ended at High Sierra, which also means all my apps are dead-ended. Some websites don't function well or at all on the highest version of Safari I can run. -- I retired in 2018, so this isn't interfering with my livelihood. But it's a pain. So my current plan is to get a Mac Mini M2 and monitor over the Thanksgiving holiday. Your revelation of the poor performance of your 2012 iMac with OCLP confirms my choice for one final new desktop computer. I do have a newer Air, but the smaller screen and touchpad are not convenient for some of the things I still do on a computer.

[urnmarketing]

After many videos and hours of trying we finally did it a solo update on a (32GB RAM 1TB SSD 2012 IMAC)

[bestillandknowthatuaregod]

Great info!! I wish the back ground music wasn't so loud

[uzahmed]

Thanks alot bro cus you are really honest with your work...I did same what you have done and its worked....❤❤❤❤

[HBKjeffrey]

can't install on my mac 8.1 because the keyboard and mouse stuck at black screen with 2 different logo's with a green lamp on a computer or notebook ??

[mohsinmmj]

Done smoothly on iMac 2013. Thanks !!!

[darkftforce]

i have an iMac A1311 21.5" from 2011 with i5 quad core 8GB Ram. after installing sonoma, my Bluetooth does not remain ON, after i turn it ON, it turns off automatically after 5 seconds. any help?

[Idunno]

How can I go back to Ventura, decided my computer doesn’t run it well

[cyrusnderitu]

Thank you for this. However, I have run the latest update (Sequoia) on my iMac 21.5 inch late 2012) but it comes up as ' macOS Sequoia is not compatible with this Mac.' What do I need to do? It has over 700 GB available storage plus I installed the software via an external drive as you did. Many thanks

[gsm-worldsheffield]

Hi thanks for the video but when I try to creat installer using open core legacy patcher I'm getting this error.
can you please help me. its Mac desktop 2012 catalina
Failed to create macOS installer

Output: Started erase on disk3
Unmounting disk
Creating the partition map
Waiting for partitions to activate
Formatting disk3s2 as Mac OS Extended with name OCLP-Installer
Initialized /dev/rdisk3s2 as a 29 GB case-insensitive HFS Plus volume
Mounting disk
Finished erase on disk3
Copying essential files...
Copying the macOS RecoveryOS...
Making disk bootable...
Copying to disk: 0%... 10%... 20%... 30%... 40%... 50%...


Error: Erasing disk: 0%... 10%... 20%... 30%... 100%
Error: Error Domain=NSCocoaErrorDomain Code=512 "“SharedSupport.dmg” couldn’t be copied to “SharedSupport”." macOS Sonoma.app/Contents/SharedSupport/SharedSupport.dmg, NSUserStringVariant=(
Copy
), macOS Sonoma/Install macOS Sonoma.app/Contents/SharedSupport/SharedSupport.dmg, macOS Sonoma.app/Contents/SharedSupport/SharedSupport.dmg, {Error Domain=NSPOSIXErrorDomain Code=6 "Device not configured"}}The copy of the installer app failed.
The bless of the installer disk failed

[cxupid]

Everytime I hold the option key it doesn't work, what should I do? By the way I fixed the memory stick issue

[arya.s.o.]

Thank you for the informative video. I have a 2013 500GB 21.5” iMac and I want to get OCLP to get the MacOS Sanoma. I was asking someone on if they thought I should do it, and they said updating to Sanoma could bog down the computer a lot, making miserably slow. The person suggested sticking with what I have but I would love to not see the vintage icons etc. What are your thoughts on this? Do you suspect it could slow down the computer? If I do it and it does slow it down is it possible to uninstall and it’ll stop being slow? Idk what other questions to ask but you get the general idea.

[wesleypires]

I'm installing Sonoma via an external USB drive on my late 2013 iMac, 24GB, NVIDIA GeForce GTX 775M 2 GB. Will it run good and will it wipe my current stored data on the main HDD?

[eibadtariq]

Hey I upgraded my late 2013 21.5 inch 1tb imac on macos 14 it’s really slow took 10 mins just to boot and then i really can’t use is much as bearly working and very slow and unresponsive can anyone help as I don’t want to downgrade thanks heaps

[akeronnqvist]

Very nice job! A comment only; a bit slower pace and no music is better for most people,

[OkashaAbu]

Please, my macbook 2012 pro is 8gb, and core i5 can it run on it perfectly?please 🙏

[joseph.christiansen]

I got a late 2013 iMac 21.5 it has an Intel i5 processor and 16 gigs of ram with a Fusion Drive it currently runs Mac OS Catalina as this was the last supported version for this model. I was curious if I can use this attempt to upgrade to Mac OS Sonoma with out having to upgrade any internals in the iMac as I don’t really want to spend any more money on this Mac being I just want a temporary solution until I’m able to finally save up enough money to buy a new Mac.

[paulwharton]

Thank you really helpful advice - Value your final opinion.