Garageband will work with a Mac with a suitably powerful G4 or G5 processor (ideally with a large chunk of memory to play with). The latest version requires Mac OS X 10.5.6 but only needs an Intel processor to use the Learn to Play lessons feature.
Maybe.
Yes, Apple does make Intel bases Mac computers starting January 10, 2006.
All Macs come with the iLife software suit that includes Garageband.
Mac OS X PPC is a version of Apple's Mac OS X operating system that runs on Power PC (PPC) architecture. This is opposed to Mac OS X for X86 which runs on Intel-based Macs. Mac OS X 10.0 through 10.5 can run on PowerPC based macs whereas Mac OS X 10.6 Snow Leopard will only run on Intel-based Macs.
In reference to installation CDs or binaries, Universal refers to its ability to run on both PowerPC and Intel-based Macs. PowerPC binaries can only be run on Intel Macs via emulation, which can be quite slow.
Mac OS X 10.3 (Panther) was available between 2003 and 2005 and is only supported on the PowerPC Macs not on the later Intel Macs.
To allow for the transition from the older PPC Macs (G4 & G5 Macs) to the recent Macs with Intel processors single applications can be created to work on both systems rather than produce two separate applications. The single applications are known as Universal.
You can't Sorry, It made for Intel Macs only.
Linux will run on all PCs with an Intel 80386 or compatible processor and higher. Linux will run on a select few m68k Macs (like the Mac Classic II), almost all PowerPC macs (like the PowerMac G3, G4, G5, and the iMac), and all Intel Macs.
Hedgewars is only available for the Intel Macs.
PowerPC Mac OS X apps are emulated transparently on Intel Macs. For "Classic" programs, you'll have to use an emulator like SheepShaver.
No. The old PPC Macs will not be able to support Sims 3.