Version 2.5 is out now and available for download. This contains an XPC build engine for better security and privilege separation in the IDE.

Version 2.4 is out now and available for download. This is the first version with support for macOS 10.15 Catalina.
(If you are running an older version of macOS and have issues, you can try reverting to an older build of S4A such as version 2.3.)

Old News...

Version 2.3 contained bugfixes and was the last version using the old build toolchain. This version contained some 32 bit code and is not compatible with macOS 10.15 Catalina.

Version 2.2 is out. Along with a lot of bugfixes, stabilisation and speed improvement, this adds some advanced features for burning bootloaders, etc. and a manual option for overriding the automated board detection.

Version 2.0 is out! This is a bringing together of many different strands of work from library upgrades to IDE revamps. Looking good!

Version 1.8 is out! Some amazing new features here. Many, many thanks to Mark Swanson for his tireless, creative and professional contributions, the IDE feels like a new product. We make a great team!

Version 1.6.1 is out! More bugfixes to syntax highlighting (beta).

Version 1.6 is out! With support for globals in files other than main.swift and some small bugfixes to syntax highlighting (beta). Enjoy!

Version 1.5 is out! Contains a few bugfixes, some simple indenting and a beta of syntax highlighting. Much thanks again to Paul Shelley for his great work on syntax highlighting, we hope you love it!

Version 1.4 is out! I found that the AVR backend currently has occasional optimiser issues. If your code is behaving unexpectedly with optimisations turned on (which is the default) then try going into preferences and turning it off. This version makes sure that turning optimisations off only affects the last stage of the pipeline (the bit with the issue) so you'll still get much of the performance benefits anyway. Later versions will attempt to track down and fix the optimiser issue.

Version 1.3 is out! Containing bugfixes for the Arduino detector contributed by Paul Shelley, as well as large font mode and new library functions to use the internal arduino temperature sensor and band gap.