How to dual boot macOS Sierra & OS X Yosemite?

[Technologx]

I have a 1TB HDD I've already partitioned it to be both 500GB. The main partition has macOS Sierra installed and the other partition I want to install OS X Yosemite. The Yosemite update I have is a pkg file and when I try to open it it won't allow me because I'm not running 10.10. So what do I need to do to be able to install Yosemite on the partition?

 

[Mr_Brightside_@]

Use DiskMakerX to install it onto a USB drive, boot off that, install 10.10 into the blank partition.

 

[Technologx]

It didn't work it's asking for ASObjC Runner.app and it won't work with a pkg file

 

[CoastalOR]

I have a 1TB HDD I've already partitioned it to be both 500GB. The main partition has macOS Sierra installed and the other partition I want to install OS X Yosemite. The Yosemite update I have is a pkg file and when I try to open it it won't allow me because I'm not running 10.10. So what do I need to do to be able to install Yosemite on the partition?

You need the full Yosemite installer (Install OS X Yosemite.app) to do a install of Yosemite on you other partition.

The Yosemite updater can not do a full install. As you have already encountered the Yosemite updater pkg can't launch without Yosemite is already installed since it only contains the files to "update" an existing Yosemite installation.

BTW, DiskMakerX also require the "Install OS X Yosemite.app" to create a bootable USB installer.

 

[Technologx]

I used Mavericks I can't find the Install OS X Yosemite app

 

[supermariofan25]

I used Mavericks I can't find the Install OS X Yosemite app

You can get the 'Install OS X Yosemite.app' from the App Store for free, even when using macOS Sierra (It will give you a warning saying that the version you are downloading is older then the version installed, just click Download Anyway or something similar to that.)

 

[Technologx]

You can get the 'Install OS X Yosemite.app' from the App Store for free, even when using macOS Sierra (It will give you a warning saying that the version you are downloading is older then the version installed, just click Download Anyway or something similar to that.)

I can't because the Mac AppStore is showing that I never even downloaded it when that was the place I downloaded it from when it 1st came out.

 

[supermariofan25]

I can't because the Mac AppStore is showing that I never even downloaded it when that was the place I downloaded it from when it 1st came out.

Try this: https://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=915041082&mt=12&ls=1
Not sure if the link will work as I am not using a Mac right now.

 

[Technologx]

Try this: https://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=915041082&mt=12&ls=1
Not sure if the link will work as I am not using a Mac right now.

I get that it's not available in the US store

 

[kryten2]

I can't because the Mac AppStore is showing that I never even downloaded it when that was the place I downloaded it from when it 1st came out.

So it's not found under Purchased?

Info : http://apple.stackexchange.com/questions/221875/why-cant-i-find-os-x-yosemite-in-the-mac-app-store

 

[Technologx]

Nope it's not