Imac 6.1 m1200 need advice?

Question

macOS

I was given this miracle in the 19th year, so I decided to see what kind of animal.
It costs 10.7.5 Youtub lags terribly, although the vidyuha is normal GeForce 7300 265m
watched split vidos there on the same poppy everything flies on Safari. Here I have some questions:
1. What OS was when buying.
2. Do I need to install a driver for Nvidia on 10.7.5 which costs right now.
3. Is there a draft in the OS that was installed when buying!

Thanks in advance to anyone who can help!!

Answer 1

I worked for this.
When buying the OS was - OS X Tiger - 10.4
Firewood is present in all versions, the OS is completely ready after installation.
I advise you to install OS X Snow Leopard - 10.6.
The snow leopard does not have such horse requirements as the lion 10.7.

Answer 2

Yes, you won’t really turn around on c2d ...
Maybe, well, these makosi, put something from Linux?