LARSEN2K4  I totally agree with you ... in my opinion this is just ridiculous behavior...  
(Version 2.0b1)

GAVIN CUTSHALL  Why not G4? G3? Why not 68040? The reason is that a non x86 SDK would require emulation to run the simulator, which is most likely just virtualizing on the x86 instruction set. In other words, possibly two layers of emulation or virtualization.

Like running PearPC inside Virtual PC.

Also, because even dual G5s are horribly slow compared to most intel hardware (save the original core solo mini).  
(Version 2.0b1)

SECTION8  what he said :)  
(Version 2.0b1)

IMNH  it is what it is...

...get over it  
(Version 2.0b1)

LEPPE  I can say that I build this night my first iPhone app on a PPC G5.

Just install this software on a Powermac G5 and you will have much chance that it will work just fine.

If you want to be sure that the iPhone SDK is installed, performe a manual installation (package after package).

BTW: Aspen Simulater is running just fine on my G5 PM ;)

Oh, and PPC is not DEAD. It's still alive and kicking. I know because I'm a PRO beta tester and I'm also writing some code in my free time. Leopard is running great on a PPC based Mac. Games and OpenGL apps too.

I run Halo with 60+ fps average and Doom3 benchmarks (with a optimized AutoExec.cfg file) are great in native resulation (1680x1050) and high quality (57fps). Much higher then the average Intel Mac!

UT2K4 tops 500fps...

So don't talk about PPC is dead when the latest OS is running on it and when 95% of the software is still Universal.

Greetz  
(Version 2.0b1)

HOLGER WATERMANN (G5)  Thanks for your Solution - it simulates here too. Maybe we will find an Crosscompiler for gcc also...  
(Version 2.0b1)

ZANGIEF  I too run on a PPC Mac. I got Leopard at the premier and it actually has made my Mac a little speedier. It's an iBook G4, last model ever produced (got it a few months before the MacBooks came out).

I don't have an iPhone or plan on developing iPhone apps right now, but it's nice to know that there's a solution.  
(Version 2.0b5)

SAMSOFTWARE  Here is something that might help for installing on PPC leopard machines:

Step 1
:

The iPhone SDK comes in a .dmg image file, which is read only, since we are going to write to it in Step 2, the first thing we do is convert it to a read/write image.
To convert the .dmg file launch Disk Utility, pick File->Open Disk Image, and chose the SDKs dmg file. Now click on "Convert" on the Top of the utility. The Dialogue which opens will say "Image Format: Compressed" -> which we set to "Read/Write" the other box (encryption) we leave alone. Chose a target where you want it saved and press save. 
Disk Utility will now take its time and decompress the image to another (uncompressed, read/write) image.

Step 2
:

Mount the Image by doubleclick on it, but do not start the SDK installation yet. You should be able to open /Volumes/iPhone SDK/iPhone SDK.mpkg/Contents/iPhoneSDK.dist in your favorite text-editor now. What we are going todo now is make sure that a few checks Apple build in return true, even if they fail. For that search the functions: agreedToSLA and SDKPresent and make sure they return "true" under all circumstances. (if you do not know what that means, what exactly are you going to use the SDK for again? ;)

Step 3
:

Start the Installer, contained in the image. Happy Installing.

_________________________________________________

now for installing on a tiger machine, there is a way to trick the installer into thinking that your machine is a leopard machine, as of right now I don't think I am going to say because when you click "Install" in just says the install failed, and it can do bad stuff to the system if you are not careful.  
(Version 2.0b8)