Upgrade from 10.5.8
Hello. I have a iMac 2009. I was searching for upgrades , it upgraded successfully and i saw El Capitan in app store. I installed it and mac was not working very well with this version so i decided to downgrade. I used a DVD with Snow Leopard 10.5.6. I searched for updates and it updated only to 10.5.8 and now it doesn't find upgrades anymore, so i can't update to 10.6.8. It's very bad because a big part of programs are not working on this version and i can't use normally my mac...How can i upgrade it?
iMac, Mac OS X (10.5.6)