Bootable USB installer for Yosemite DP5 and DP7 and GM1

[tywebb13]

To make a bootable USB installer for yosemite DP5, DP7 or GM1, format an 8 GB USB drive which should be called Untitled and formatted as Mac OS Extended (Journaled). Get a code for the full installer in the mac or ios dev center and redeem it in the mac app store, or if necessary, redownload it from the purchases tab in the mac app store. After the installer app downloads it should be called Install OS X Yosemite Developer Preview.app and should be in your Applications folder.

Run this in terminal and wait about 20 minutes:

sudo /Applications/Install\ OS\ X\ Yosemite\ Developer\ Preview.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ Yosemite\ Developer\ Preview.app --nointeraction

 

[tywebb13]

Exactly the same command can be used for the DP7 that was released today too.

 

[mavis]

Thanks for posting this!

 

[tywebb13]

Exactly the same command can be used for the GM1 that was released today too.

I was expecting that the name of the installer may have been different for GM1, but it isn't.

 

[mavis]

Exactly the same command can be used for the GM1 that was released today too.

I was expecting that the name of the installer may have been different for GM1, but it isn't.

Sorry, but I've already updated to GM1 - how exactly would I re-download it now?

 

[tywebb13]

That depends how you updated it.

If you just updated with the delta update, you still need to redeem a code for the full installer from the mac dev center or ios dev center.

If on the other hand you already redeemed a code for the full installer and used that to install it, the installer will delete itself and unless you backed it up before restarting, you can only get it back by redownloading it again from the purchases tab in the mac app store.

 

[roland.g]

On an interesting note, I actually put PB1 on a SD card, not the bootable installer but I installed it to the SD card. I was then able to put the SD card into the slot on a 2012 MacBook Air and boot into Yosemite and run it off the SD card. However, performance wasn't the greatest. I moved my install to a USB 3.0 drive but it was interesting that it could work.

 

[That-Guy]

If installing GM Candidate 1 from USB (fresh install) will I be able to update to final GM version by just doing a software update and without doing another fresh install?

 

[Peace]

Just a FYI. The Dev portal now has the full 5.1GB app.