OS X productivity application to block access to different websites

This gave me enough info to fix the Minecraft launcher. The prior answer works, but has an ugly menu name, which my son would pester me about. So instead, I fixed the Minecraft.app setup.

In a nutshell, in terminal:

cd /Applications/Minecraft/Contents/MacOS
mv JavaApplicationStub Minecraft
cat > JavaApplicationStub << EOF
#!/bin/sh

exec `dirname $0`/Minecraft "$@"
EOF
chmod +x ./JavaApplicationStub

Basically, it would appear that ParentalControls expects the application being run to match the name of the executable (which is not the case with the distributed app: It's Minecraft.app, and JavaApplicationStub), so by moving the executable to match the app name, it works. I had to create a shell script to actually exec the executable because I got "Path not found" otherwise.

This seemed to work.

I only put this here because it worked for me. If you do not understand the code block again, please keep in mind you might have to re-download the app (or make a copy first).

you can use Self-Control to create a time-schedule. Check here and here.

You could also use a browser extension, like WasteNoTime. Goto Settings->Time Allowed->Edit Settings. Here you are able to create a time-schedule. It appears that you use several browsers. I know WasteNoTime is available for Chrome and Safari. Probably also for Firefox but I haven't checked.

I have not tried using different time-windows for different websites. Normally you want to block all disturbing websites at once. There are more browser extension which block websites, you would probably have to check them. Or you could install several such browser extensions and set them to different websites and time-frames.