CiderPress II

CiderPress II is a software tool for working with vintage Apple software, specifically that used on the Apple II series of computers and early Macintoshes. It is the successor to the CiderPress utility.

Key features:

A brief (3-minute) introductory video is available. See this page for a complete list of supported file formats and conversions.


The tool is available with a graphical user interface (GUI) and a command-line interface (CLI). These have roughly equivalent feature sets. The CLI runs natively on a variety of systems (including Windows, Linux, and macOS), while the current GUI runs only on Windows.

Download the latest release (1.0.1) from github.

Free Software

The full source code for CiderPress II is available on github, distributed under the Apache 2.0 license, which allows use of the code in both commercial and non-commercial projects.

The code is written in C# .NET, using the (free to download) Visual Studio Community 2022 IDE as the primary development environment. The GUI uses the Windows Presentation Foundation (WPF) API.

As part of this project, documentation was created for all of the supported archive, disk image, and vintage file formats. These are included with the source code, and can be accessed from the CiderPress Format Documentation Index.