Little Snitch and macOS Big Sur
The current version 4 of Little Snitch intercepts network traffic by means of a Network
Kernel Extension. This type of kernel extension is deprecated in macOS Big Sur and will no
longer be loaded in the default configuration. We will provide instructions how to install Little
Snitch 4 on macOS Big Sur soon.
Little Snitch 5 will be based on the new Network Extension framework instead, which is
fully supported on macOS Big Sur.
All customers who purchased Little Snitch 4 within a one-year period prior to the final release
of Little Snitch 5 (about this fall) will receive the upgrade for free. If you purchased Little
Snitch 4 before that period, we will offer the upgrade at a reduced price.