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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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Level 10

239,921 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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Best reply

Level 10

239,921 points

Oct 5, 2020 9:28 AM in response to rachana164

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).

Reply

Oct 5, 2020 12:18 PM in response to rachana164

This should work https://support.apple.com/kb/DL1970?locale=en_US

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10403 error not found

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