The computer, Mac or Windows, isn't really the deciding factor, it's the minecraft app and/or the other mods compatibility'sthat will affect the out come. You can only have so many mods before you start having errors or crash's because they don't get along. Read the information on each mod as they will usually tell you which one's they are compatible with.
This is a question to ask on the My Minecraft Mods forum topic. It may not be compatible with a Mac yet.
They don't.
any will load mods onto minecraft but the better operating system the more mods you can have
Google for Modstallation. You can use that software to install mods.
Go to Youtube and search for Minecraft mods. There are just too many and some are installed differently then others.
You should use forge.
Yes, you can. Google for Modstallation and use that software to install your mods. Follow the instructions online too.
I have windows but this should work on Mac. I drag one file into the other file you right click and hit rename to name it My Minecraft Mods or whatever you wanna call it.
GO to ragusumis mods...type in modloader download scroll down until you see it next to his other mods and download it
I recommend a PC-most mods are for PC and not mac and also another word of advice for a picking a computer for Minecraft. Mo RAM mo fast!
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.
If you are talking about just Minecraft with no mods and just the vanilla game you don't need anything but the game. If you need to download a mod just look up tutorials on YouTube on the mod you are installing and specify that the installation is for mac or you'll get a PC one.