I take it your using minecraft?
You have to follow Forge's instructions AND the mod's your using instructions to make sure it's done right. Some mods have you do it different so you have to read their instructions. Basically making sure your using a forge compatible mod helps.
You should use forge.
Google for Modstallation. You can use that software to install mods.
any will load mods onto minecraft but the better operating system the more mods you can have
Yes, you can. Google for Modstallation and use that software to install your mods. Follow the instructions online too.
Go to Youtube and search for Minecraft mods. There are just too many and some are installed differently then others.
This is a question to ask on the My Minecraft Mods forum topic. It may not be compatible with a Mac yet.
Yeah prob
yes
You will have to install Windows using Boot Camp.
They don't.
You can't use mods on Mac or iMac, it only works on PC.
no all are for PC i think