Finally I made up my mind to use OSX, went to Akihabara area to buy PowerBook G4. I got a new Mac! I was very excited when I opened the box which was very neat. The aluminum alloy body, a backlit keyboard (keyboard is illuminated in the dark), they are NICE.

There was a cap to protect the end of a power adapter. It looked like a capsule for medicine. Nice. All ports moved to the side. I use digi-cam everyday, it would be convenient.