There is a Dreamcast emulator, known as lxdream, under active development for Linux and Mac OS X. It is not completely stable yet and is only capable of running a few games.
Yes. DeSmuME is available for Mac OS X.
yes zerowii
Classic Mac OS games can be used in Mac OS X if the Mac is a PowerPC Mac, the game was written for PowerPC processors, and the version of Mac OS X is Tiger or older. They cannot be used on Intel Macs except via the use of a third-party emulator, such as SheepShaver.
No, for all of the Old World macs (pretty much MacOS 2.0 -9.2 ) you need the ROM image. The system needs the information on the ROM chip to run.
No, bootcamp is not required for virtual machines which are running from mac os x. Parallels is a virtual machine emulator you can put any virtual OS into it without disturbing your Mac OS X system setup. Bootcamp is used when you are installing windows natively on the mac.
The second name of Mac OS X v10.4.5 is Mac OS X v10.4 Intel.Mac OS X 10.4 was known as Mac OS X Tiger.
I am afraid that the .n64save and .n64freeze formats are used only by the propriety n64 emulator for Mac OS X, Sixtytforce. [www.sixtyforce.com]
Mac OS X 10.4 (Tiger) needs to be purchased as it is not possible to update from Mac OS X 10.2.8
Mac OS X is an operating system released by Apple Inc. It is designed for Apple branded computers, which is why you will never see a Dell, or an HP computer run Mac OS X. There are only two important versions of Mac OS X, Mac OS X Server, and regular Mac OS X. Mac OS X server was designed for servers, while regular Mac OS X was designed for most computers. The current version of Mac OS X (10.6) is named Snow Leopard.
VirtualPC can do that. There is a port of QEMU to Mac OS X that should run even better, but it is a bit more difficult to use.
PowerPC Mac OS X apps are emulated transparently on Intel Macs. For "Classic" programs, you'll have to use an emulator like SheepShaver.
Yes, it is. Any type of MacBook that comes out now is a Mac OS X. The most recent version of Mac OS X is Mac OS X Lion, coming out soon.