Recently tried to upgrade a Mac OS X Mini Server 2001 to Mac OS Sierra 10.12.6.

Little Snitch 3.7.3 Patch Mac is available as a free download from our software library. Little Snitch 3.7.3 Serial Key for Mac allows you to protects your computer against unwanted guests from the Internet and also protects your private data from being sent out. Little Snitch Network Monitor is a good monitoring tool, the threshold of network traffic monitoring can be taken to a whole new level. The real-time graph provides complete communication information, combined with powerful and simple options for analyzing total traffic, bandwidth, and connection status.

Sierra OS software was installed and booted OK but could not get any network connection. iCloud connection could not be reached and thus could not sign into iCloud to setup accounts upon reboot.

I had Little Snitch 3.7 running prior to install and installed Sierra over it. However, upon reboot after the Sierra upgrade, Little Snitch was not allowing any application to communicate with the internet. Network diagnostics showed Wifi, Ethernet, and iPhone hotspot as having five green lights and making a successful internet connection.

After uninstalling Little Snitch and rebooting, internet access became available.

Little Snitch 3.8

It may be wise to uninstall Little Snitch firewall prior to performing a major upgrade in OS X and then reinstall after.

Little Snitch 3.8.2

macOS Sierra (10.12.6)

Little Snitch 5

Posted on Sep 24, 2017 5:25 PM