Copy the minecraft worlds from the file explorer
no, unless you download it illegaly......
Yes.
Yes because macs are very clear for minecraft because I have done that before
hold down SHIFT and 2 = @
If you can play Minecraft then you can install the Too Many Items mod.
MacBook Pro is the best you can get
Size is one big difference but for a full run down check here http://gizmodo.com/5063492/macbook-and-macbook-pro-dual-review
If you meant; "what's in a MacBook?", well... LOTS of things. Just head to the Apple website to find an in-depth description of the hardware and software of the MacBook Pro line. Please be aware that the MacBook line as been discontinued, replaced by the full MacBook Pro & Air line.
MacBook Pro!
The macbook pro!
Hm. It works just fine for me. Try re-installing Minecraft.jar