Apple’s Worldwide Developers Conference to kick off June 10 at 10 a.m. PDT with Keynote address

The Keynote will be available to stream on apple.com, the Apple Developer app, the Apple TV app, and the Apple YouTube channel. On-demand playback will be available after the conclusion of the stream.

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rachana164 Author

Level 1

5 points

10403 error not found

I am unable to update my MacOS high sierra to 10.13.6. I am getting an error 10403 not found. What does the error mean?

Posted on Oct 5, 2020 8:51 AM

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BDAqua

Level 10

240,293 points

Posted on Oct 5, 2020 9:28 AM

Are you usingFirefox?

Try reinstalling this in Safe Mode, but not using Firefox...

https://itunes.apple.com/app/macos-high-sierra/id1246284741?mt=12

Safe Boot, (holding Shift key down at startup).

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10403 error not found

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