Cannot mount InstallESD.dmg of ML on a Leopard MBA!

Crisis

macrumors member
Original poster
Jul 19, 2012
48
41
I bought a new rMBP last month and received a redeem code for Mountain Lion. Now I am trying to upgrade my Late-2009 MBA, which is still running a Leopard system. However, I copied the InstallESD.dmg from the installation package to this Leopard machine and it cannot be mounted, not to say restoring it to a flash disk.

Is it because the system is to obsolete that cannot read newly released dmg files? This mba is in my another house and I didn't bring my new rMBP here. so the InstallESD.dmg and a Leopard machine is all I have here, please please give me some advice!
 

iVoid

macrumors 65816
Jan 9, 2007
1,120
145
Have you tried copying the entire "Install Mountain Lion" app to the SL machine?
 

Icy1007

macrumors 65816
Feb 26, 2011
1,041
63
Cleveland, OH
I bought a new rMBP last month and received a redeem code for Mountain Lion. Now I am trying to upgrade my Late-2009 MBA, which is still running a Leopard system. However, I copied the InstallESD.dmg from the installation package to this Leopard machine and it cannot be mounted, not to say restoring it to a flash disk.

Is it because the system is to obsolete that cannot read newly released dmg files? This mba is in my another house and I didn't bring my new rMBP here. so the InstallESD.dmg and a Leopard machine is all I have here, please please give me some advice!
You can't upgrade a Mac with Leopard to Mountain Lion.
 

Crisis

macrumors member
Original poster
Jul 19, 2012
48
41
Have you tried copying the entire "Install Mountain Lion" app to the SL machine?
No, clearly it cannot run on a Leopard so I copied the InstallESD.dmg inside it.

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You can't upgrade a Mac with Leopard to Mountain Lion.
I know, I guess Apple means the Install Mountain Lion app runs only on SL and Lion. That for upgrading, but what I am trying to do here is creating a bootable installation disk and wipe my HD drive and make a clean install.