You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Bootable Drive For Legacy Mac

I have an old Powerbook (2009 15in) running El Capitan. I tried to do a clean install to wipe the Hard Drive, but it is hung up in Recovery Mode and will not complete the OS install. Disc Utilities recognizes the Hard Drive. First Aid says it's fine.


I want to create a bootable USB drive to see if I can use Dic Utilities to select it as the HD, and I'd like to use Yosemite, as the computer worked better before updating El Capitan.


The trouble is that all of the instructions I find to make a bootable USB Drive have commands that include the "Yosemite.app," but all I can find to download is the "InstallMacOSX.dmg" file. I have also looked in the Ap Store under "my purchases, but it does not show any OS software.


Does anyone know where to find "Yosemite.app"?


Posted on Oct 7, 2021 8:47 PM

Reply
Question marked as Top-ranking reply

Posted on Oct 7, 2021 11:18 PM

After you download the InstallOSX.dmg you then go two more processes to get the Install OS X Yosemite.app

which you use to install Mac OS X Yosemite 10.10.5 or create the bootable USB installer.


Open your Safari browser and click on the link below,

How to get old versions of macOS – Apple Support

Go to Download macOS and click on OS X Yosemite 10.10

this downloads InstallMacOSX.dmg to your Downloads folder.


The next section can only be done on a mac that is capable of running Yosemite,

a mac that came preinstalled with an OS later than Yosemite will refuse to do the next bit.


When downloaded open to InstallMacOSX.pkg, double-click on

that and an installation window will open, this does not install Yosemite

but converts the InstallMacOSX.pkg to the Install OS X Yosemite.app which 

you will find in your Applications folder.


(If the installation window asks which disk you want to install to, you must pick 

the disk that you are booted to at the time. Not any internal or external disk that 

you want to eventually install Yosemite on, that is for later.)


To start the installation of Yosemite double click on the Install OS X Yosemite.app.


The copy of the install app self deletes after installing Yosemite, so make sure you keep a copy of the InstallMacOSX.dmg

if you need it in future, or you could just make a copy of the Install OS X Yosemite.app prior to installing and moving it to

an external drive for safe keeping. It is also possible to create a bootable USB installer disk using the Install OS X Yosemite.app

in the Applications folder and the createinstallmedia command in the Terminal app. 


Read the instructions here,

How to create a bootable installer for macOS – Apple Support


sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ OS\ X\ Yosemite.app

Similar questions

2 replies
Question marked as Top-ranking reply

Oct 7, 2021 11:18 PM in response to Mac Fish

After you download the InstallOSX.dmg you then go two more processes to get the Install OS X Yosemite.app

which you use to install Mac OS X Yosemite 10.10.5 or create the bootable USB installer.


Open your Safari browser and click on the link below,

How to get old versions of macOS – Apple Support

Go to Download macOS and click on OS X Yosemite 10.10

this downloads InstallMacOSX.dmg to your Downloads folder.


The next section can only be done on a mac that is capable of running Yosemite,

a mac that came preinstalled with an OS later than Yosemite will refuse to do the next bit.


When downloaded open to InstallMacOSX.pkg, double-click on

that and an installation window will open, this does not install Yosemite

but converts the InstallMacOSX.pkg to the Install OS X Yosemite.app which 

you will find in your Applications folder.


(If the installation window asks which disk you want to install to, you must pick 

the disk that you are booted to at the time. Not any internal or external disk that 

you want to eventually install Yosemite on, that is for later.)


To start the installation of Yosemite double click on the Install OS X Yosemite.app.


The copy of the install app self deletes after installing Yosemite, so make sure you keep a copy of the InstallMacOSX.dmg

if you need it in future, or you could just make a copy of the Install OS X Yosemite.app prior to installing and moving it to

an external drive for safe keeping. It is also possible to create a bootable USB installer disk using the Install OS X Yosemite.app

in the Applications folder and the createinstallmedia command in the Terminal app. 


Read the instructions here,

How to create a bootable installer for macOS – Apple Support


sudo /Applications/Install\ OS\ X\ Yosemite.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume --applicationpath /Applications/Install\ OS\ X\ Yosemite.app

Oct 8, 2021 6:29 PM in response to Mac Fish

Unless you had software compatibility issues with third party apps there really should be no real difference between Yosemite and El Capitan. My guess is the macOS upgrade triggered a hard drive failure which is affecting system performance. You can check the health of the hard drive by running DriveDx. Post the complete DriveDx report here using the "Additional Text" icon which looks like a piece of paper.

Bootable Drive For Legacy Mac

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.