macOS 10.15.4 shows message that a “Legacy System Extension” will be incompatible with a future version of macOS.

Starting with macOS 10.15.4 the above “Legacy System Extension” message will be shown when Little Snitch is installed.

→ Please read this blog post to learn more about why this message is shown.

• Jun 27, 2017  Customers who already own a license for version 2 or 3, get the upgrade for just US $25. Little Snitch offers a free demo-mode in version 4, which offers the same protection and the same functionality as the paid version. The network filter (firewall) will be deactivated after three hours, but it can be re-activated as often as desired.
• Mar 31, 2020 With Little Snitch for Mac, users can prevent personal information. Little Snitch for Mac can be tried out for free for 30 days. After that, $29.95 buys the full version with no restrictions.

Little Snitch 4.4.3

Will there be an update of Little Snitch that’s compatible with macOS 10.16?

Upgrade your existing License. Little Snitch Gift Card Runs on macOS 10.11 up to 10.15 (Catalina). The gift card comes with coupon code that must be redeemed in order to receive the personal Little Snitch license key. Little Snitch 4, Single License $ 45.

Yes. We are going to release Little Snitch 5 later this year, which will be compatible with macOS 10.16. → Learn more…

Will I get the update for free?

Yes. All licenses sold now include a free upgrade to Little Snitch 5. In addition, customers who purchased Little Snitch 4 within a one-year period prior to the final release of Little Snitch 5 will also get a free upgrade. → Learn more…

Will Little Snitch 4 run on macOS 10.16?

Little Snitch 4 Torrent

Little Snitch 4 will not be loaded on macOS 10.16 by default, but there will still be an option to allow the loading. → Learn more…