Lion 10.7 won't boot up on my new mac 10.8.4

I have a new MacBook Pro 10.8.4. I need to boot up from 10.7 (Lion) for a recording job I am doing. The mixing desk I am using will only recognise Mac's which are 10.7 or ealier. I have Lion 10.7 installed on a USB drive but my mac won't recognise it or want to boot from it. Any suggestions?

Hiya. I'm presently waiting on my machine to attempt loading another stab at the installer drive, so I can't verify, but I'm pretty sure when I bought the first generation Intel Mac Pro it was a Dual Duo Core 2.66, which I upgraded about a year back to 8-core. I wondered about there being a difference in the creation of the installer drive made from the Airbook versus the Mac Pro, so loaded Lion Diskmaker 3b3 to Mac Pro and used it to make the installer from the Mac Pro, still no luck at present starting up from it. Again, in Startup Drive prefs, Snow Leopard recognizes it as a startup drive, just doesn't load when restarting from it.
Interesting you idea about there possibly being a difference in the Lion installer downloaded from the Airbook's App Store versus from the Mac Pro, though that relates back to the original (boring) problem. Here goes. I had bought Mountain Lion for the Mac Pro to meet system requirement for newly purchased Foundry product, Mari. (I later learn that my version Mac Pro tops out with 10.7.5, can't even get to Mountain Lion, but that wasn't revealed until this other, yet deeper problem was revealed, my not being able to login to my iTunes, which the system update requires. A much longer and more boring story ended by my learning that a fried Ethernet card was the problem. I knew of this bad Ethernet card, had been using a USB Ethernet adaptor, but when Lion first came out with introduction of the App Store, it was written into the code for the iTunes server to respond to a query by a user's iTunes login to first search for EN0, that being the build in Ethernet, to then establish handshakes around login info and checking what computer was being upgraded to what level, etc. Had this code been written more broadly to simply establish any type of Ethernet connection, e.g. USB or wireless, there'd be no problem, but now you see the catch 22. Having lost my Revovery HD partition vis a vis boring story A, and with no instal disks for Lion, and with no way to login to my App Store account to download my stored version of Lion, I can't try your tack of downloading from the machine being upgraded.
Pretty nuts, eh. Any other thoughts?
Big thanks.

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  • All about a Transport! (ver y urgent)

    Hi all,       Can anyone help me knowing all the possible transaction codes helpful while doing or dealing with a transport. Any tables which reveal the effect of a transport , and is there a way to roll back the effect of a transport which has been