you should and need to be running what is supported by Apple and others now: Snow Leopard 10.6.8 which you can buy for $30, then see if you can upgrade to Lion or ML for another $19-29 from App Store (but by phone as only Mountain Lion is offered directly)How to Buy Mac OS X Mountain Lion/Lion
Direct you to the proper forum for MacBook :
MacBook Series Forums
Mac OS X Forum
This forum deals with a desktop/tower 65lb Mac Pro
My Mac is OS 10.5.8 and I have tried to download the newest Adobe Flash (I have 10.3.183.86 but my games need a newer one) and I keep getting an error message. Any hints on fixes?...
There is a slightly newer version of Flash on Adobe's website near the bottom of the page. But as you can see there, Adobe is going to abandon that version in about two weeks. In any case, it's likely that whatever upgrades Adobe was making on 10.3.183.xx were security fixes, not the feature additions/improvements your games are looking for. The hatter is right - you need to upgrade your OS so that you can run the current version of Flash.