Mac 911 - Dec. 2007

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Bugs & fixes

Bug: iPhone error 1603

When trying to restore your iPhone in Apple’s iTunes, you may see the following error message: “The iPhone could not be restored. An unknown error occurred. Error 1603.” To fix this problem, restart your Mac and try again. If that doesn’t eliminate the error, connect your iPhone to a different USB port, ideally one that’s connected to the Mac itself (rather than to a keyboard or USB hub).

Fix: Console log infinite loop

Launch Apple’s Console utility (/Applications/Utilities) and check your Console log. Do you see the same message repeatedly—for example, “Looking for devices matching vendor ID=1193 and product ID=8717”? If so, this almost certainly means that a running program is searching for a hardware peripheral that’s not connected to your Mac. It’s a minor problem that could slow down your Mac’s performance.

How does the offending software wind up on your Mac? In my case, it happened when I installed the software for my Canon scanner. It installed two items in my Login Items list, each necessary to enable the buttons on Canon scanners. However, only one was for my model; the other (named NO67U_ButtonManager) was for a different model. That was the file that was generating the errors. The solution is simple: go to your Accounts preference pane, click on the Login Items tab, and delete the unnecessary item from the list. Log out and log back in, and the Console errors should stop.

Fix: DMG file mounting glitch

After you download a disk image ( .dmg ) file, it should either mount automatically or mount when you double-click on the file. If it doesn’t, the Finder might be attempting, and failing, to open the .dmg file in a seemingly random application (in my case, Adobe GoLive CS).

To fix this, select the image file, hold down the option key, and select File: Always Open With. In the menu that appears, select DiskImageMounter. If this application is not in the menu, select Other and navigate to the /System/Library/CoreServices folder. You’ll find the DiskImageMounter application there.

[ Senior Contributor Ted Landau is the founder of MacFixIt and the author of Take Control of Troubleshooting Your iPhone (TidBits Publishing, 2007). Share your problems at or on’s Mac 911 forum. ]

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