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Moreover, redesigning the x86 would defeat one of the goals of moving to that hardware-taking advantage of an economy of scale. However, replacing the controller would be relatively simple, Cooksey said, noting that one of numerous off-the-shelf x86-based memory controllers could be used in a new Mac motherboard design.Īpple could conceivably get AMD or Intel to design a CPU that operates on the existing Mac motherboard, but it would be "much easier to change the memory controller than to redesign the CPU," Cooksey said.
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Because it uses a different addressing scheme than the one used in PC systems, the Mac's current UniNorth memory controller would not provide data in a format that the new CPU would understand. However, Apple continues to make its own memory controller, which would have to be redesigned to work in an x86 system, said Chris Cooksey, director of engineering at XLR8. Hardware concernsĪpple uses many off-the-shelf PC components, such as USB, PCI and ATA, and their requisite controllers are all capable of supporting an x86 CPU. "Apple would likely ship a proprietary box instead of going the PC clone route," he said. Scott Anguish of StepWise, a longtime OpenStep/Cocoa developer, believes that Apple would probably take this approach if it decided to embrace AMD or Intel.
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If Apple followed its tradition of designing systems from the ground up-rather than simply porting the OS to generic PC hardware-its engineers could drastically reduce the number of drivers needed, he said.
"Creating these drivers would not be so bad if Apple sanctions a specific hardware configuration for a new x86 Mac," Berry said.
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Critical Path offers driver development and Mac OS X porting services.
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James Berry of Critical Path Software agreed that creating drivers is a well understood task, but said it would still require a significant allocation of resources. "Drivers are straightforward-I don't think that Apple is facing research problems here," Murphy said. Straightforward processįor Apple, developing the needed drivers would not be a big engineering challenge. Manufacturers would have the option, as they do now, of making their hardware work with Apple's generic drivers - if available - or creating their own. To get Darwin - and ultimately Mac OS X - to run on different configurations, Apple would need to develop new drivers for the mouse, CD-ROM, memory controller and other components. Sanchez' achievement with Darwin came on one specific PC configuration, and Apple still does not offer PC installers for download.
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Subscribe to IDG.net's free daily newsletters Questions about computers? Let IDG.net's editors help you NeXT Computer's OpenStep operating system ran on x86 hardware.Īpple shores up open-source commitment with DarwinĪpple's old nemesis is now one of its best developers "Rebuilding the kernel would not be too difficult because Mac OS X is built on the same Mach kernel that NeXT used," he said. However, Murphy said that making the move would largely be a matter of rebuilding the Mach kernel - the part of the OS that talks directly to the hardware - and writing new device drivers. In April, at Apple's annual shareholders meeting, CEO Steve Jobs said that the company had no plans to port the Mac OS to Intel hardware. "If Apple were to devote time and resources to this project, it could definitely be done," said Bob Murphy, chief technical officer for ShadeTree, whose business includes porting other companies' applications to Mac OS X.Īpple declined to comment for this article. Apple - and Mac developers - would also face the challenge of managing dual hardware platforms because there would still be a huge base of Macs with PowerPCs.
Nevertheless, developers told MacWEEK that Apple could port its next-generation OS to PC hardware with relative ease - if it were willing to make trade-offs, such as abandoning Classic Mac applications or forcing them to run in a slow emulation environment.
Internet message boards lit up again in October when Apple reported slower-than-expected fourth-quarter sales and saw its stock value plummet.ĭarwin is only the foundation of Mac OS X, and does not include such elements as the Quartz imaging engine or the Aqua graphical user interface.
The calls to action began early this year when Apple software engineer Wilfredo Sanchez reported that he had successfully compiled the Darwin OS to run on a PC. (IDG) - As Motorola struggles to boost the speed of the PowerPC G4, Mac users have been speculating for months about the possibility that Apple might dump the chip in favor of CPUs from Advanced Micro Devices (AMD) or Intel. Could Apple run Mac OS X on PC hardware? From.
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