Move over Windows. Apple Computer, which has for years run an alternative operating system (OS) for Macintosh computers and PowerPCs, is giving its finishing touches on a new OS which, for the first time in the companys history, will run natively even on Intel-based systems. The company recently successfully loaded its new OS, codenamed Darwin a stripped-down version of the MacOS X Server - onto a Macintosh as well as an Intel-based system. The success of this product will also be significant for the company because for the first time, there will be a serious alternative to Windows in the PC segment. Experts say Darwins biggest advantage would be its cross-platform compatibility, which allows it to be used in both Macintosh and ibm PC platforms - an area where Microsofts Windows is a clear loser.