Download of AVRFusesCalc 2.3 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This Mac application is an intellectual property of Marcin Gibas. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The software lies within Education Tools, more precisely Science.
From the developer:
AVRFusesCalc helps you to set the fuse bits and lock bits in the micro controllers ATmega and ATtiny from Atmel. AVRFusesCalc” recognizes the connected microcontroller and loads its settings, regardless of the clock speed. It can also determine what programming protocol, SPI or TPI, is required for communication with the microcontroller.
You may want to check out more Mac applications, such as Gee, Arcade Math Blocks or NLVM, which might be related to AVRFusesCalc.