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macosdarwinxnu

How can I find the xnu version that corresponds to a particular OS X release?

I'm attempting to find the list of supported syscalls in an old version of OS X.

For each version of the XNU kernel, there is a syscalls.master file that gives me what I want (for example, here is one for XNU 2782.20.48). I can see my current XNU version with uname -a. But I don't know how to find what version of XNU was included in historical releases of OS X.

Is there a list somewhere mapping OS X version number (e.g. 10.9.0) or build number to XNU version number?

Solution

  • Not perfect, but you can work it out from the Apple Open Source release listings at:

    http://www.opensource.apple.com/

    For each release linked (eg http://www.opensource.apple.com/release/os-x-10105/ for OSX 10.10.5), you have a link towards the bottom of the page for the XNU version for this release (eg, xnu-2782.40.9).

    @pajp has gone to the effort of converting these tarballs into a useable git repo at:

    https://github.com/aosm/xnu

    with appropriate tagging for OSX release and XNU version, which you could use to put together a listing.