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eercolani Author

Level 1

14 points

Can I update to High Sierra from El Captain 10.11.6 with security error NET::ERR_CERT_DATE_INVALID

Can I update to High Sierra from El Captain 10.11.6. or do I first have to install Sierra? MacBook Pro 13" Mid 2012 Model Identifier: MacBookPro9,2 Processor Name:Intel Core i5 Processor Speed:2.5 GHz Number of Processors:1 L2 Cache (per Core): L3 Cache:3 Memory: 8 GB Boot ROM MBP91.00DA.B00 Storage: Available: 826.99 GB (826,988,589,056 bytes) Capacity: 998.97 GB (998,973,898,752 bytes) Apple site suggested that the NET::ERR can be fixed by updating OS to High Sierra. All other troubleshooting ideas did not work. Eileen

MacBook Pro 13″, OS X 10.11

Posted on Jun 4, 2022 8:57 AM

Top-ranking reply

Allan Jones

Level 9

72,302 points

Posted on Jun 4, 2022 9:17 AM

A mid-2012 Macbook Pro can support up to mac OS 10.15 "Catalina." Yes, were it mine I would do 10.13 first, then decide on whether to go higher. Mojave is fine but Catalina will not run your older apps.

That error sounds like an issue with an outdated browser. What browser are you using?

Many computers that were not kept updated began to show certificate errors last September, when a major supplier of security certificate to web devleopers replaced the old version with one that does not support El Capitan.

All other troubleshooting ideas did not work.

We don't knw what those are. Different sources show different steps.

The most likely issue—and easiest to check—is that an older, outdated version of the installer is already in your Applications folder. Check for that and, should you find one, delete it.

Where did you find the installer? If posted on a non-Apple site, it is likely out of date and potentially dangerous.

Get old installers only from this Apple page and use Safari for the download and install:

How to get old versions of macOS - Apple Support

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Can I update to High Sierra from El Captain 10.11.6 with security error NET::ERR_CERT_DATE_INVALID

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