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OS X updates hang at 0 bytes

Any time I try to download an OS X update, the App Store acts like it is going to start downloading, but then just sits at 0 bytes downloaded until the update times out. I have no problem downloading any third-party apps or their updates from the store, only updates to OS X or the included apps. The same thing goes for my iPhone - the iOS App Store works fine for downloading apps and updates, but I cannot download updates to iOS itself (though it will show that an update is available). This has been going on for a couple months now. Any ideas?

Posted on Jul 10, 2014 6:41 AM

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8 replies

Jul 10, 2014 8:20 AM in response to that-guy-who-needs-help

Launch the Console application in any of the following ways:

☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

☞ Open LaunchPad. Click Utilities, then Console in the icon grid.

The title of the Console window should be All Messages. If it isn't, select

SYSTEM LOG QUERIES ▹ All Messages

from the log list on the left. If you don't see that list, select

View ▹ Show Log List

from the menu bar at the top of the screen.Click the Clear Display icon in the toolbar. Then try the action that you're having trouble with again. Select any messages that appear in the Console window. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.

The log contains a vast amount of information, almost all of which is irrelevant to solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.

Please don't indiscriminately dump thousands of lines from the log into this discussion.

Please don't post screenshots of log messages—post the text.

Some private information, such as your name, may appear in the log. Anonymize before posting.

Jul 10, 2014 8:34 AM in response to Linc Davis

Here's the console log from the time I tried to start the update to when I cancelled it:


7/10/14 11:28:46.436 AM com.apple.SecurityServer[14]: Session 100025 destroyed

7/10/14 11:28:46.452 AM com.apple.SecurityServer[14]: Session 100026 created

7/10/14 11:28:48.315 AM com.apple.WebKit.WebContent[2794]: CKSoftwareMap: Registering with Daemon

7/10/14 11:28:49.064 AM com.apple.WebKit.WebContent[2787]: CKSoftwareMap: Registering with Daemon

7/10/14 11:28:49.066 AM com.apple.WebKit.WebContent[2787]: NSScanner: nil string argument

7/10/14 11:28:49.366 AM com.apple.WebKit.WebContent[2794]: NSScanner: nil string argument

7/10/14 11:28:49.436 AM softwareupdated[1041]: CGError CGSGetDisplaySystemState(uint64_t, CGSDisplaySystemState **): MIG error 0x10000003: (ipc/send) invalid destination port

7/10/14 11:28:49.436 AM softwareupdated[1041]: CGError CGSGetDisplaySystemState(uint64_t, CGSDisplaySystemState **): MIG error 0x10000003: (ipc/send) invalid destination port

7/10/14 11:28:49.887 AM com.apple.WebKit.WebContent[2793]: CKSoftwareMap: Registering with Daemon

7/10/14 11:28:50.940 AM com.apple.WebKit.WebContent[2793]: NSScanner: nil string argument

7/10/14 11:28:53.035 AM com.apple.WebKit.WebContent[2791]: CKSoftwareMap: Registering with Daemon

7/10/14 11:28:53.038 AM com.apple.WebKit.WebContent[2791]: NSScanner: nil string argument

7/10/14 11:28:57.698 AM softwareupdated[1041]: CGError CGSGetDisplaySystemState(uint64_t, CGSDisplaySystemState **): MIG error 0x10000003: (ipc/send) invalid destination port

7/10/14 11:28:57.698 AM softwareupdated[1041]: CGError CGSGetDisplaySystemState(uint64_t, CGSDisplaySystemState **): MIG error 0x10000003: (ipc/send) invalid destination port

7/10/14 11:28:57.777 AM softwareupdated[1041]: CGError CGSGetDisplaySystemState(uint64_t, CGSDisplaySystemState **): MIG error 0x10000003: (ipc/send) invalid destination port

7/10/14 11:28:57.778 AM softwareupdated[1041]: CGError CGSGetDisplaySystemState(uint64_t, CGSDisplaySystemState **): MIG error 0x10000003: (ipc/send) invalid destination port

7/10/14 11:29:00.323 AM com.apple.WebKit.WebContent[2793]: ERROR: ITSExceptionHandler: {message:"TypeError: 'null' is not an object (evaluating 'document.querySelector("#header").addClassName')", url:"https://se.itunes.apple.com/htmlResources/FFDF/da-storefront-autoinstallations.j s", lineNumber:"336"}

Jul 10, 2014 9:06 AM in response to that-guy-who-needs-help

Please read this whole message before doing anything.


This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.


Step 1


The purpose of this step is to determine whether the problem is localized to your user account.


Enable guest logins* and log in as Guest. Don't use the Safari-only “Guest User” login created by “Find My Mac.”


While logged in as Guest, you won’t have access to any of your documents or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this behavior; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.


Test while logged in as Guest. Same problem?


After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.


*Note: If you’ve activated “Find My Mac” or FileVault, then you can’t enable the Guest account. The “Guest User” login created by “Find My Mac” is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.


Step 2


The purpose of this step is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login, by a peripheral device, by a font conflict, or by corruption of the file system or of certain system caches.

Please take this step regardless of the results of Step 1.


Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards, if applicable. Start up in safe mode and log in to the account with the problem. You must hold down the shift key twice: once when you turn on the computer, and again when you log in.

Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a Fusion Drive or a software RAID, you can’t do this. Ask for further instructions.


Safe mode is much slower to start up and run than normal, with limited graphics performance, and some things won’t work at all, including sound output and Wi-Fi on certain models. The next normal startup may also be somewhat slow.


The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.


Test while in safe mode. Same problem?


After testing, restart as usual (not in safe mode) and verify that you still have the problem. Post the results of Steps 1 and 2.

OS X updates hang at 0 bytes

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