OS X Mavericks 10.9.3 (Build 13D55) Seeded

Apple seeded OS X 10.9.3 (Build 13D55) to registered Mac developers, made available through their Software Update mechanism in the Mac App Store, as well as through the Mac Dev Center.

Focus Areas

– Graphics Drivers
– Audio
– Safari
– Contacts and Calendar sync over USB in iTunes
– Mail

Everyone else interested in testing OS X 10.9.3 (13D55) without being a registered Mac software developer, or member of the OS X Beta Seed Program, can change their App Store URL by entering the following terminal command (all on one line):

sudo /usr/sbin/softwareupdate --set-catalog https://swscan.apple.com/content/catalogs/others/index-10.9seed-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog.gz

Note: You can verify your change using the following command:

defaults read /Library/Preferences/com.apple.SoftwareUpdate CatalogURL

You can undo this change using the following command:

sudo /usr/sbin/softwareupdate --clear-catalog

Or by using this command:

sudo defaults delete /Library/Preferences/com.apple.SoftwareUpdate CatalogURL

Now the CatalogURL should have changed to:


The default one for Mavericks.

OS X Beta Seed Program

Currently this update is not showing up for members of the OS X Beta Seed Program, which as we found out previously, uses a different URL:

sudo /usr/sbin/softwareupdate --set-catalog https://swscan.apple.com/content/catalogs/others/index-10.9publicseed-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog.gz

Apple may of course still want to add this update, at a later time, but if this is to happen more frequently… then I would suggest you stick to the good old CatalogURL.

Legal Notices

Use of this confidential, pre-release software is subject to the Software License Agreement for Apple Confidential OS X Pre-Release Seed Updates presented upon installation of the OS X Software Update Seed Configuration Utility. The original Software License Agreement that accompanied commercially-available versions of the software being updated does not apply to these pre-release seed updates.


I had to change a plist to get past a ‘boot hang’ – black screen in single user-mode – like before:



A more permanent solution for this would be to add it to some kext, but I personally don’t care about that. Not right now.

Also. A quick look at /S*/L*/E*/IOPlatformPluginFamily.kext/C*/P*/X86PlatformPlugin.kext/C*/Resources revealed that all plist are unchanged. Still no plists for the new board-id’s (Mac-C9CF552659EA9913 and Mac-81E3E92DD6088272) which may never happen until new/updated Apple hardware is released.


The fact that this update is not available for members of the OS X Beta Seed Program may mean that Build 13D55 is the Golden Master (GM) and that OS X 10.9.3 will soon be released.


You need to use --set-catalog and/or --clear-catalog (both with two minus signs) but wordpress.com appears to eat one of them!

22 thoughts on “OS X Mavericks 10.9.3 (Build 13D55) Seeded

  1. Hi!

    I already have OS X 10.9.3 (Build 13D28) installed. How could I install this new update? Any chance? Any way? Thanks

  2. It will not work for me!!!!I have a GTX580.Tried with DSDT and without DSDT.
    Please help…
    I use this:



    • 1) A different SMBIOS model/board-id works?
      2) What label (GFX, GFX0, GFX1…) are you using for your graphics card?
      3) Is the IGPU disabled / setup as first/second graphics adapter in your (UEFI) BIOS?
      4) Do you have a second PC setup that you can use (remote desktop)?
      – are all drivers loaded?

      • I sent you later my DSDT and IOReg files.
        1.On the first question the answer is that I have not tried!!
        2.My labeel on DSDT is GFX0.
        3.On my UEFI BIOS IGPU is set auto.
        4.I don’t have a second PC.I’m from Serbia.
        Thanks in advance

  3. Hi pikeralpha,

    I copy/pasted your one-liner to change the catalog URL into the Terminal, and when I ran it, softwareupdate displayed the help file message when an unknown command is entered. Any ideas?


    • What version of OS X are you using? For example. This is not supported with OS X 10.8.5 You can also check this with:

      defaults read /Library/Preferences/com.apple.SoftwareUpdate CatalogURL

      That should report the URL and not: “The domain/default pair of (/Library/Preferences/com.apple.SoftwareUpdate, CatalogURL) does not exist”

      Edit: I now also added a note about the mandatory minus signs (two of them) because for some odd reason is wordpress.com eating one of them!

  4. AppleGraphicsControl.kext modification you mention here worked like a charm on my hack on the release version of 10.9.3. Otherwise I was hanging during boot. Thanks so much.

  5. Hi there,

    I have followed your blog a bit and find it fascinating. Great work!

    I am currently encountering the black screen issues after installing 10.9.3, I have changed Config1 to none in AppleGraphicsControl.kext as mentioned:

    In one of your earlier replies:
    1) A different SMBIOS model/board-id works?
    2) What label (GFX, GFX0, GFX1…) are you using for your graphics card?

    What SMBIOS model/board-id would you suggest inserting? My system definition is an iMac 12,2 to match my i5-2400. I am using a GTX 550 Ti but cannot check the label this moment.

    Best wishes,

    • Hi Craig,

      Thanks. Now. My workaround will only work when you’ve setup your configuration as a MacPro6,1 with board-id Mac-F60DEB81FF30ACF6. However. Your iMac12,2 with board-id Mac-942B59F58194171B is different and thus won’t be using said workaround. And yes. A different model and board-id combo might work, notably Macmini5,N with board-id Mac-7BA5B2794B2CDB12, but in case you are using Clover as boot loader, then drop the MCFG (SMBIOS) table from your Clover config file. As for the GFX label. Normally it is GFX0 for discrete graphics cards and IGPU for Intel HD Graphics.

      Hope this helps.

  6. Is there something wrong with the path or have I screwd up my system?

    cos under /System/Library/Extensions/AppleGraphicsControl.kext/Contents/PlugIns

    I can see only:


    but not AppleGraphicsDevicePolicy.kext

    • I checked the official release package from Apple’s website and it is there so something went wrong on your end. My advise is to download the combo update of OS X 10.9.3 and to reinstall the OS.

  7. Pingback: Patching AppleGraphicsDevicePolicy.kext | Pike's Universum

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