macOS: Hummingbird 1.2.1 available

Staff

Hello!

We're very glad to inform you that we have just released Hummingbird 1.2.1 for macOS (High Sierra or higher version required). Hummingbird is available natively both for Intel and M1 based Mac computers.

Hummingbird is free and open source released under GPLv3: https://gitlab.com/AirVPN/hummingbird

Main features

Lightweight and stand alone binary
No heavy framework required, no GUI
Small RAM footprint
Lightning fast
Up to 100% higher throughput than OpenVPN 2.5 (on 1 Gbit/s lines)
Based on OpenVPN 3 library fork by AirVPN
Robust leaks prevention through Network Lock based on pf
Proper handling of DNS push by VPN servers

What's new

all libraries and dependencies have been updated

Important note for high speed line users
Because of some architectural specifications and implementation in macOS, in particular in case of high speed traffic Hummingbird may warn the user about shortage of buffer space, specifically when connected with the UDP. This condition is signaled by Hummingbird with the below messages in the log:
```
UDP send exception: send: No buffer space available ERROR: NETWORK_SEND_ERROR
```
The error is caused by the maximum network sockets size set in macOS, a value usually small and unsuited for modern high speed networks. The solution consists in increasing the maximum allowed size for socket buffers and, in case the problem persists, the number of mbuf clusters. The procedure is simple, please find out all the details in the manual. Open the README.md file with any viewer and search for "SEND_ERROR", or consult the online manual.