Q: Mac OS X update error 10.10.4.

I experienced the same problem. This did the trick. Many thanks!!

Jul 27 11:37:36 Melcords93. local softwareupdated[347]: Adding client SUUpdateServiceClient pid=523, uid=501, installAuth=NO rights=(), transactions=0 (/System/Library/Frameworks/WebKit.framework/Versions/A/XPCServices/com.apple.W ebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent)

Jul 27 11:37:53 Melcords93.local softwareupdated[347]: Scan for changed products with previous 1 updates: 031-25780 (plus 129 predicate-only)

Jul 27 11:37:53 Melcords93.local softwareupdated[347]: SoftwareUpdate: Scan for client pid 347 (/System/Library/CoreServices/Software Update.app/Contents/Resources/softwareupdated)

Jul 27 11:37:55 Melcords93.local softwareupdated[347]: SoftwareUpdate: Catalog Not Modified since last scan ("5880e-51bd226683940")

Jul 27 11:37:55 Melcords93.local softwareupdated[347]: SoftwareUpdate: Using catalog https://swscan.apple.com/content/catalogs/others/index-10.10-10.9-mountainlion-l ion-snowleopard-leopard.merged-1.sucatalog.gz

Jul 27 11:37:55 Melcords93.local softwareupdated[347]: Added 214 PPD versions for /Library/Printers/PPDs/Contents/Resources from cache as of 2015-07-01 05:57:36 +0000

Jul 27 11:37:56 Melcords93.local softwareupdated[347]: SoftwareUpdate: elapsed scan time = 2.9

Jul 27 11:37:56 Melcords93.local softwareupdated[347]: Scan (f=0, d=0) found 1 updates: 031-25780 (plus 129 predicate-only)

Jul 27 11:37:56 Melcords93.local softwareupdated[347]: Ramped updates marked

Jul 27 11:37:57 Melcords93.local softwareupdated[347]: Adding client SUUpdateServiceClient pid=523, uid=501, installAuth=NO rights=(), transactions=0 (/System/Library/Frameworks/WebKit.framework/Versions/A/XPCServices/com.apple.W ebKit.WebContent.xpc/Contents/MacOS/com.apple.WebKit.WebContent)

Jul 27 11:38:03 Melcords93.local installd[380]: PackageKit: Adding client PKInstallDaemonClient pid=347, uid=200 (/System/Library/CoreServices/Software Update.app/Contents/Resources/softwareupdated)

Jul 27 11:38:03 Melcords93.local installd[380]: PackageKit: Removing client PKInstallDaemonClient pid=347, uid=200 (/System/Library/CoreServices/Software Update.app/Contents/Resources/softwareupdated)

Jul 27 11:38:03 Melcords93.local storeassetd[271]: SUAppStoreUpdateController: disk space required for updates is: 4900695067

Jul 27 11:38:03 Melcords93.local storeassetd[271]: SUAppStoreUpdateController: combined state is 1

Jul 27 11:38:03 Melcords93.local storeassetd[271]: SUAppStoreUpdateController: isDownloadRequiredForPostLogoutUpdate returning YES

Jul 27 11:38:06 Melcords93.local storeassetd[271]: SUAppStoreUpdateController: combined state is 1

Jul 27 11:38:06 Melcords93.local storeassetd[271]: SUAppStoreUpdateController: isDownloadRequiredForPostLogoutUpdate returning YES

Jul 27 11:38:06 Melcords93.local storeassetd[271]: SUAppStoreUpdateController: start download session with 031-25780

Jul 27 11:38:06 Melcords93.local softwareupdated[347]: SoftwareUpdate: Added foreground transaction [0x3] for OSXUpd10.10.4-10.10.4

Jul 27 11:38:06 Melcords93.local softwareupdated[347]: SoftwareUpdate: starting download of 031-25780 (OSXUpd10.10.4-10.10.4)

Jul 27 11:38:06 Melcords93.local softwareupdated[347]: ContentLocator: No modified URL found

Jul 27 11:38:36 --- last message repeated 1 time ---

Jul 27 11:47:36 Melcords93.local softwareupdated[347]: finishing with resume data

Jul 27 11:55:08 Melcords93.local softwareupdated[347]: finishing with resume data

Jul 27 11:55:08 Melcords93.local softwareupdated[347]: No more tasks - invalidating session now

Jul 27 11:55:08 Melcords93.local softwareupdated[347]: SoftwareUpdate: finished download of 031-25780

Jul 27 11:55:08 Melcords93.local softwareupdated[347]: Stopping transaction with ID [0x3]

Jul 27 11:55:08 Melcords93.local softwareupdated[347]: SoftwareUpdate: Removed foreground transaction [0x3]

Jul 27 11:55:08 Melcords93.local storeassetd[271]: SUAppStoreUpdateController: status for 031-25780: 031-25780 (a=0x1): downloaded (1091664667 of 1091664667) 100.0% -1.0s

Jul 27 11:56:08 Melcords93.local storeassetd[271]: SUAppStoreUpdateController: prepare for root mode with 031-25780

Jul 27 11:56:08 Melcords93.local softwareupdated[347]: AssertionMgr: Take com.apple.softwareupdate.PostLogoutInstallAssertion assertion with type MaintenanceWake for pid 347

Jul 27 11:56:08 Melcords93.local softwareupdated[347]: Cannot register 031-25780 for post-logout install since not fully downloaded

Jul 27 11:56:08 Melcords93.local softwareupdated[347]: Set products to install at logout: No products to install

Jul 27 11:56:08 Melcords93.local softwareupdated[347]: SUAppStoreUpdateController: We didn't register all updates for post-logout

Jul 27 11:56:08 Melcords93.local softwareupdated[347]: No products remaining for post-logout - aborting post-logout install.

Jul 27 11:56:08 Melcords93.local storeassetd[271]: SUAppStoreUpdateController: Not stashing for post-logout as there's no products to install

This was the latest update I had.. Im not sure if I did this right? How does this change anything for my messages? 

Marker - Sep 16, 2015, 11:32:05 PM

It just couldn't be easier, could it.....