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I use Microsoft OneNote on my Mac.

How can I can turn off the Internet access to Microsoft OneNote on my Mac?

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5 Answers 5

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What you're looking for is called an application firewall. One free/open source program that does this job is called LuLu -- https://objective-see.com/products/lulu.html -- with code on github here.

Edit: some example images of the firewall page itself, which pops up when a program makes a connection attempt:

LuLu application firewall

Rules once made can be configured via an app, which has a UI a bit like this:

Lulu app

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  • 1
    wonderful solution Sep 26, 2019 at 10:06
  • does it work ? is it safe?
    – Matian2040
    Dec 18, 2021 at 4:35
  • unfortunately you can't build it from sources and then run it without paying 100 bucks to apple Feb 8 at 22:58
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You can use a 3rd party app called Little Snitch to block Internet access for individual apps. Little Snitch comes with a limited 30 days free trial and costs € 45 for single user license thereafter.

Another alternative is Radio Silence, a network monitor and firewall app for macOS. It lets you control Internet access on an individual app basis. Radio Silence comes with a full 30 days trial and costs US$ 9.

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    Thank you! Do you know if it cost any money?
    – Maria
    Nov 20, 2018 at 18:01
  • Yes, it's not free, but it is a highly-respected app - obdev.at/products/littlesnitch/order.html
    – Tetsujin
    Nov 20, 2018 at 18:03
  • @Maria Yes, it comes with a limited 30 days trial and costs € 45 for single user license.
    – Nimesh Neema
    Nov 20, 2018 at 18:03
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    I'd recommend Tripmode - €7.99 and it's on the App Store.
    – Araho
    Nov 20, 2018 at 22:42
  • Can't the Mac's built-in firewall be used instead?
    – thosphor
    Nov 21, 2018 at 8:58
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You can try Hands Off. It is free. Works almost like Snitch.

https://www.oneperiodic.com/products/handsoff/

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  • It may have been free in the past, but it's $50 USD now. Aug 16, 2021 at 19:49
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If it is just OneNote you want to block from using Internet you can do that in OneNote app.

You can work offline on OneNote app by turning off the

automatic sync settings.

Click the Show Navigation icon on the upper-left corner of your OneNote app window and select Settings.

Under Settings, select Options and turn off Sync notebooks automatically using the slider.

It will save your files locally (your hard drive). in

~/Library/Containers/com.microsoft.onenote.mac/Data/Library/Application Support/Microsoft User Data/OneNote/

No need to block internet since already has the option to work offline. (and it is free)

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You are certainly looking for a reliable and resilient, yet unobtrusive firewall. I recommend you to get LuLu, it is free and open source software regularly maintained on Github and does the job perfectly !

https://objective-see.com/products/lulu.html

enter image description here

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  • It’s OK to post duplicate answers, but they tend to get voted as second class / less valuable content. Making an edit to an existing post to show a screen shot like this brings lots of value and kudos when done well.
    – bmike
    Sep 26, 2020 at 19:05

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