[np1810]

> LittleSnitch is great for MacOS; it is easily configured to alert you every time your machine makes ip/domain connections, which can then be accepted, denied, or rules made

For an open-source alternative, consider checking out - Lulu [0]. It's not as feature rich nor has impressive UI like the former but gets the main work done.

[0] https://github.com/objective-see/LuLu

[addandsubtract]

It's not open source, but I can also recommend Vallum[0] as a cheaper alternative to LittleSnitch.

[0] https://www.vallumfirewall.com/

[nonamenoslogan]

I use LuLu, it works great. Its kept my older versions of Photoshop and Acrobat from complaining and showing me ads for newer versions for the last couple years!

[djkoolaide]

Tossing in a suggestion for Vallum[0] here. It's not FOSS but very polished and a fraction of the cost of Little Snitch.

[0]: https://vallumfirewall.com/

[XdekHckr]

Are you for realy using apple products? Yuh...