The latest version of GarageBand requires Mac OS X 10.5.6 or later to work. It also requires 1GB of memory if it is handling several tracks in a song.
The Mac's Garageband, iMovie etc. applications only work with Mac OS X. There is no Windows version to work on other PCs.
Yes, you must have a Mac to install Garageband. You could theoretically install a Mac OS on a PC, however the legality of that is highly questionable considering the fact that the colloquialism for such a computer is "Hackentosh".
GarageBand is only available for Mac OS X, so no you can't.
For basic music production, GarageBand will do, and it comes with Mac OS X. For more advanced music production, Apple's Logic Studio is a good option: http://www.apple.com/logicstudio/ .
Mac OS 9 software requires Mac OS 9, which was discontinued in 2002, to work. Early versions of Mac OS X came with Mac OS 9 included (referred to as Classic mode) which could be activated from System Preferences. The latest versions of Mac OS X no longer support Classic mode. It will depend upon your specific Mac model whether a version of Mac OS 9 can be persuaded to work.
Garage-band is Only made for Ipad , Ipad 2 , Or Mac OS So i think you can download it on Mac if you have one though.
FrostWire will work on a Mac which is running Mac OS X 10.4 or later.
A G4 iMac needs to be running at 867MHz or faster with Mac OS X v10.5.6 Leopard to use most of iLife '09.Neither iMovie nor GarageBand's Learn to Play feature will work as they require an Intel-based Mac with a dual-core processor.
iPhone apps work on iOS devices (iPhone, iPad or iPod Touch) they will not work on a Mac running Mac OS X 10.7 (Lion) or any other Mac OS X version
Driver Whiz will not work with the Mac OS.
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.
Providing the Intel based computer is manufactured by Apple then their Mac OS X software can work on it. The Mac OS X user's licensing agreement prevents Mac OS X being used on computers that are not made by Apple.