Text 11006, 67 rader
Skriven 2006-05-17 14:52:16 av Rich Gauszka (1:379/45)
Ärende: Apple closes down Intel OS X kernel
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From: "Rich Gauszka" <gauszka@hotmail.com>

they'd be better off selling os x with approved motherboards as I doubt they
can stop the pirates

http://www.infoworld.com/article/06/05/17/78300_21OPcurve_1.html

Thanks to pirates, or rather the fear of them, the Intel edition of Apple's OS
X is now a proprietary operating system.

Mac developers and power users no longer have the freedom to alter, rebuild,
and replace the OS X kernel from source code. Stripped of openness, it no
longer possesses the quality that elevated Linux to its status as the second
most popular commercial OS.

The Darwin open source Mach/Unix core shared by OS X Tiger client and OS X
Tiger Server remains completely open for PowerPC Macs. If you have a G3, G4, or
G5 Mac, you can hack your own Darwin kernel and use it to boot OS X. But if you
have an Intel-based Mac desktop or notebook, your kernel and device drivers are
inviolable. Apple still publishes the source code for OS X's commands and
utilities and laudably goes several extra miles by open sourcing internally
developed technologies such as QuickTime Streaming Server and Bonjour
zero-config networking. The source code required to build a customized OS X
kernel, however, is gone. Apple says that the state of an OS X-compatible open
source x86 Darwin kernel is "in flux."

Apple has only shipped client systems, the users of which care least about
openness. Soon, though, Apple will break out Intel variants of the kinds of
machines that InfoWorld readers buy and on which I depend; namely, servers and
workstations. I hope that Apple's flux settles into a strategy that favors
demanding users and developers.

Apple's retreat to a proprietary kernel means that all users must accept a
fixed level of performance. The default OS X kernels are built for broad
compatibility rather than breakneck speed and throughput. That doesn't matter
at present, because all Intel Macs are built on the same Core Duo/Core Solo
32-bit architecture. But Apple's workstation and server will be built using
next-generation 64-bit x86 CPUs. The chipset, the bus, the memory, almost
everything about the high-end machines will be much advanced over iMac and
MacBook Pro. Intel's road map plots a rapid course to ever higher performance.
Macs will inherit the benefits of Core Microarchitecture's evolution, but OS X
is limited in the degree to which it can exploit specific new features without
creating branch after branch of OS code to handle each tweak to the
architecture.

Users in demanding fields such as biosciences or meteorology do hack OS kernels
to slim them down, alter the balance between throughput and computing, and to
open them to the resources of a massive grid. The availability of Intel's
top-shelf compilers, debuggers, libraries, and profilers create unprecedented
opportunities to optimize OS X for specific applications.

Even if I don't need to hack the kernel, knowing that I can affords me a level
of self-sufficiency and insulation from vendors' whims that fixed system
software, such as Windows', does not.

Apple is in the unique position of losing hardware sales to software pirates.
It faces the risk of cloned Macs being distributed in foreign markets where
intellectual property protection is weak. I empathize. But there are ways to
address the piracy issue without stripping the critical and defining quality of
openness from OS X. That's a subject addressed in my Enterprise Mac blog.

I hope it's discussed at Apple so that OS X's openness can be pulled from its
state of flux and restored to the state that OS X's most demanding users expect
and deserve.

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