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High Sierra update 10.13.3 won't install

I have been through the download, install & reboot process several times but the install doesn't work and I am still on 10.13.2. I can see the download happening and then the system reboots but then the App Store shows the update is still waiting to download and install. Feels like Groundhog Day!

iMac 5k Retina 27in late 2015. Any ideas?

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iMac with Retina 5K display

Posted on Jan 24, 2018 3:00 AM

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Posted on Jan 24, 2018 4:52 AM

Update: Problem solved by disabling Bitdefender (antivirus software). System installed ok and re-enabled Bitdefender and all working just fine. Interesting though this is the first time an update has been stalled even though I have had Bitdefender on my MAC for over a year. Will see what happens next time an update is issued.

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High Sierra update 10.13.3 won't install

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