I'm trying to install High Sierra 10.13.3 Supplemental Update. But I'm getting an error, which is 'The request timed out. (-1001)'

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  • Reboot your entire network, all hardware, then puter. Try again. If the same, try tomorrow. – Tetsujin Feb 22 '18 at 18:17
  • Why should he try tomorrow? How does that help? – Melvin Jefferson Feb 22 '18 at 18:27
  • Reset your internet connection. That is the culprit here. Unplug the modem and then reconnect it. – Melvin Jefferson Feb 22 '18 at 18:30
  • I've been trying for three days but I can not update. – Delowar Hosain Feb 23 '18 at 1:28
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    @MelvinJefferson - because, having worked support for nearly 10 years, it's the kind of 'advice' that pulls out extra info from the OP, usually of the previously unmentioned 'what I tried already' variety ;-) – Tetsujin Feb 23 '18 at 18:58

You need a VPN or to change your network. It seems there is a firewall blocking the Apple server.

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    Why are you shouting? – Allan May 3 '18 at 16:28
  • There can be a lot of reasons why a Mac is not able to reach the App Store server. Based on what do you assume that a VPN will solve the problem? – nohillside May 3 '18 at 16:56

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