How to download Mountain Lion application.

[coolignas1]

Hello! I have macOS Monterey on my main Mac. I want to install mountain lion on my old pc. Where I could get the application, cause when I download the .dmg file, it shows an .pkg file, I double click on the .pkg file and it says that I can't install the application. Any Ideas what to do??

 

[trs96]

I want to install mountain lion on my old pc.

what specs for the old PC ? Chipset, CPU, graphics etc.

 

[coolignas1]

what specs for the old PC ? Chipset, CPU, graphics etc.

Intel Core i7 - 970, x58 express, ATI Radeon X1800

 

[trs96]

ATI Radeon X1800

I have no idea if this card is supported by Mt. Lion. Have you researched it ?

 

[coolignas1]

I have no idea if this card is supported by Mt. Lion. Have you researched it?

idk, actually sorry if this might sound rude, but I don't really care if there is graphics drivers installed

 

[trs96]

I don't really care if there is graphics drivers installed

You'll need the driver support in mac OS X to be able to even get Mt. Lion installed.

You could install an old Radeon 5770 and then at least you would get acceleration. 12 years ago this was a very popular hackintosh card on this site. Many people used them and they work OOB. Should work with Mt. Lion.

Dell ATI Radeon HD 5770 1GB GDDR5 PCIe Graphics Card GPU 0GCJ42 | eBay

Removed from working machines. Tested and in good working order. Tested for KeyFunctions, R2/Ready for resale.

www.ebay.com

There are also many Nvidia Kepler cards you could use with Mt. Lion too.

Will my Nvidia Graphics Card work with macOS ? List of Desktop Cards with Native Support

Preamble for those new to Nvidia graphics card choices for a Hackintosh 1. You will only have success choosing macOS compatible graphics if you remember that: macOS is not Windows 2. Apple incorporates all their graphics drivers into the Mac Operating System. There are only drivers in macOS...

www.tonymacx86.com

 

[trs96]

Once you get a supported graphics card then use this online method to download Mt. Lion and make the USB installer.

Making the installer in Windows | OpenCore Install Guide

 

[UtterDisbelief]

This is a tricky one because currently Apple themselves only offer OS X back as far as Yosemite, but perhaps the GibMacOS script can go back even further?

Yes, if you run the *.pkg file on a modern Mac it will tell you that you can't expand/install it. You need to be running a version of macOS immediately prior or of the same release to the one you are trying to install. So ...

You need to go the long way round by creating an installer manually as @trs96 explained. Once you have done that then you will have to start the installation on a PC which has had its internal date set to the same - or very shortly after - the date that the OS X version was released, or it will fail again.

This is one of the biggest obstacles to installing such an old version of OS X on modern hardware. I know, I've been there. One tip is to ensure you have no Internet access live for the installer, or it will see the real date and update. Sometimes you even have to change the motherboard BIOS date too. Another thing to get your head around, is "spoofing" of a necessary, and contemporary, CPU, or again installation will fail. The GPU issue has already been covered above.