[circa]

I installed it on my iMac 27" from 2009. It does not boot now and goes into a panic. I haven't had much time to mess with it but there are no other partitions and it just does not load.

Its also weird because I have no media now. I have the discs it came with somewhere but that will also be Lion 10.7? Or possibly Snow Leopard. The re-install is going to be a bitch for me. UGH!

[pja]

If you have a friend with a Mac they ought to be able to make you a bootable USB stick which you can use to install the OS - there are instructions online for Mavericks & I's guess that you can do the same thing with Yosemite.