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This is what I see on my Mac:

$ uname -a
Darwin be-2.local 10.3.0 Darwin Kernel Version 10.3.0: Fri Feb 26 11:58:09 PST 2010; root:xnu-1504.3.12~1/RELEASE_I386 i386

I have Mac OS X 10.6.3. Why the kernel is of version 10.3? And how can I upgrade it? Thanks.

ps. I need to upgrade it because one third-party software that I'm installing (Valgrind) says to me:

...
checking for the kernel version... unsupported (10.3.0) 
configure: error: Valgrind works on Darwin 9.x (Mac OS X 10.5)
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Darwin version != OSX version – gfr May 22 '10 at 6:22
valgrind does not (yet) support Mac OS X 10.6 (Snow Leopard). See bugs.kde.org/show_bug.cgi?id=205241 and bugs.kde.org/show_bug.cgi?id=205938 – Chris Johnsen May 22 '10 at 6:54
If, on the other hand, you would like get the OS product version, sw_vers is your friend. – Kurt Feb 9 '11 at 19:26
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4 Answers

up vote 3 down vote accepted

Darwin 8.x corresponded to MacOS X 10.4.x (Tiger).

Darwin 9.x corresponded to MacOS X 10.5.x (Leopard).

Darwin 10.x corresponds to MacOS X 10.6.x (Snow Leopard).

To get valgrind to work, you would have to downgrade back to Leopard.

(I've tried getting the patch to valgrind to work - published around August 2009 - but was not successful. 'Tis a nuisance.)

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up vote 1 down vote

Because the Darwin version number is different from the OS. Darwin 9 is Leopard, 10 is Snow Leopard.

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up vote 1 down vote

It's because the Darwin kernel versions are independent of the Mac OS/X version. Check the Wikipedia article: http://en.wikipedia.org/wiki/Darwin_%28operating_system%29

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up vote 0 down vote

The underlying infrastructure is version 10.3.0. Everything on top of it (Quartz, Cocoa, Core*, etc.) is 10.6.3. There is nothing wrong with this situation.

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How can I upgrade to Darwin 10.5 or higher? – yegor256 May 22 '10 at 6:31
@Vincenzo, Dawrin 10.5 will probably be in Mac OS X 10.6.5. You will have to wait for a couple more point releases. – Chris Johnsen May 22 '10 at 6:40
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