OS X 10.3 Support
A quick heads-up for Mac users: starting with version 1.2 Signal will be ending support for OS X 10.3. The new release has started using system APIs that are only available on 10.4 and later and offer performance improvements, lower memory use, and a reduced application footprint.
In general support will be provided for the current and prior OS releases, creating a good balance between compatibility with a wide range of systems and moving the application technology forward to take advantage of the latest OS improvements. If you have any questions or concerns please don’t hesitate to contact support.