Generally speaking, no. Binaries compiled on PureDarwin can be run on Mac OS X, but most applications (with the exception of some command-line tools) use libraries like Carbon or Cocoa that aren't available on PureDarwin.
Macs use an operating system called Mac OS X which will not run applications written for the Windows operating system. Microsoft produce a Mac OS X version of Word for Apple's Mac computers. There is the option of installing the Windows operating system on a MacBook alongside Mac OS X which allows Windows applications as well as Mac OS X applications to be used.
You cannot without erasing your hard drive and installing Mac OS 9 from scratch. Even then Mac OS 9 may not run on modern Mac hardware because Mac OS 9 needs the ROM chip to boot. Modern Mac OS X hardware uses EFI to boot the system instead of a ROM chip to boot. Mac OS X v10.0 - Mac OS X v10.4 support Mac OS 9 applications and can run them, you just need to install the Mac OS 9 compatibility program which can be found on the Mac OS X Install CD.
To run Windows on your Mac you will need a copy of Windows. Apple provides Boot Camp with Mac OS X to allow Windows to be installed alongside Mac OS X. There are commercial applications that run Windows within a window on the Mac. (See links below)
Yes, you can. You might just need to download a free program. The application might run a little it slower or the quality of the picture might not be as good, but it will definitely run at a useful speed or quality.
You can download a theme to make Vista look more like OS X. It won't run OS X applications, though.
The Finder is the default application program used on the Mac OS and Mac OS X operating systems it is responsible for the overall user-management of files, disks, network volumes and the launching of other applications.
No, Microsoft ActiveX controls cannot run on Mac OS X.
The iPhone software development kit (SDK) only runs on recent versions of Mac OS X. The cheapest solution (short of trying to hack OS X to run on your PC) is to by a Mac Mini.
Unless the disc is damaged and so needs reformatting you can run the Mac OS installer over an existing Mac OS.
The 4 Applications that were released were: 1. iTunes 2. iMovie 3. iPhoto 4. iDVD All of these were created to run on OS 9 until OSX came out. All Mac OSX Releases (in order): -Mac OS X Server 1.0 "Hera" -Mac OS X Public Beta "Kodiak" -Mac OS X 10.0 "Cheetah" -Mac OS X 10.1 "Puma" -Mac OS X 10.2 "Jaguar" -Mac OS X 10.3 "Panther" -Mac OS X 10.4 "Tiger" -Mac OS X 10.5 "Leopard" -Mac OS X 10.6 "Snow Leopard" -Mac OS X 10.7 "Cougar" (still in development, scheduled for 2011 release)
It is possible to run Mac OS X on a server but it is not legally as the current license tern of Mac OS X server is installing and running on Apple hardware.
Windows applications require some form of Windows, actual or a virtual emulation, to be present for them to run on a Mac. They will not work with Mac OS X.