PPC support dropped – XCode 4
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Some weeks ago Apple released XCode 4, the newest version of their development tool. This is a quit normal an unexciting news. But quietly and mostly unnoticed Apple removed PPC (G3, G4, G5 processors) support from their developer tools.
That means the without having a separate machine running an older version of XCode developers can no longer compile their products for use on PowerPC Macs. So probably most developers (especially independent and freeware developers) will drop PPC support with upcoming versions.
To be fair, Apple introduced the Intel processors in 2006 therefore all remaining PPC Macs are at least 5 years old which is very old for a computer. And as you know since the release of Snow Leopard all new Apple Products require Intel anyway.
If you are still a proud owner of a G4 or G5 Mac, it is now time to get a new MacBook or wait some weeks for the rumored new iMacs (via: macrumors.com) and MacBook Airs (via electronista.com).
Smiling Mac Blog 
“If you are still a proud owner of a G4 or G5 Mac, it is now time to get a new MacBook…” Not trying to be an asshole, but that is not true. If my PowerPC Mac does everything I want it to do, I won’t get a new one. Lion dropped support for PowerPC apps, so getting a new Mac to replace my iBook will be a serious downgrade.
I agree with you.
The problem is only that a lot of Apps will not provide updates for PPC users which might also affect security.
However if you have a running environment you should stick with it.
Yeah, I’m sticking to it. And yes, I am may be affected by security issues in some apps, but for the browser, there is a spin-off of Firefox still being maintained for PowerPC Macs called TenFourFox. It runs on Tiger or later. They even maintain Mozilla for Mac OS 9 in a source port called Classilla!
Link to TenFourFox: http://www.floodgap.com/software/tenfourfox/
Link to Classilla: http://www.floodgap.com/software/classilla/