I have a MacBook Air running Mojave (10.14.2). My router is running a proxy using Squid that works fine on the Mac's administrator account and a user account. When the user account has Parental Controls enabled the proxy fails and no sites are reachable.
This is a known problem first reported in 2008 where Parental Controls runs the httpsproxyd daemon which interferes with external proxy operation. The solution was to either disable httpsproxyd or httpd, as described here.
- MacWorld's MacOS X Hints
- Summary: Run "sudo chmod a-x /usr/sbin/httpd"
- Result on my machine: Error "chmod: Unable to change file mode on /usr/bin/httpd: Operation not permitted"
- Apple discussion forum
- Summary: Run "sudo chmod a-x /System/Library/PrivateFrameworks/FamilyControls.framework/Versions/A/Resources /httpsproxyd"
- Result on my machine: File "httpsproxyd" does not exist in that location or anywhere else.
As both these approaches fail I'm looking for any other approaches to resolving this conflict where an account with Parental Controls enabled has issues using a proxy.
A related issue regarding how the Parental Controls interfere with HTTP/HTTPS traffic was also asked here earlier in 2017 but was unanswered. I'm including the link as it may provide additional details relating to this problem.