# Download Processing. Processing is available for Linux, Mac OS X, and Windows. Select your choice to download the software below.

4.0b1 (9 August 2021)

- Windows 64-bit
- Linux 64-bit
- macOS

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Read about the changes in 4.0. The list of revisions covers the differences between releases in detail.

### Stable Releases

- 4.0b1 (9 August 2021) Windows 64 Linux 64 macOS
- 3.5.4 (17 January 2020) Win 32 Win 64 Linux 64 Mac OS X
- 2.2.1 (19 May 2014) Win 32 Win 64 Linux 32 Linux 64 Mac OS X
- 1.5.1 (15 May 2011) Win (standard) Win (no Java) Linux x86 Mac OS X

Earlier releases have been removed because we can only support the current versions of the software. To update old code, read the changes page. Changes for each release can be found in revisions.txt. If you have problems with the current release, please file a bug so that we can fix it. Older releases can also be built from the source. Read More about the releases and their numbering. To use Android Mode, Processing 3 or later is required.

### Pre-Releases

- 4.0 alpha 6 (10 July 2021) Win 64 Linux 64 Mac OS X

The changes document covers incremental updates between 4.x releases, and is especially important to read for pre-releases.

Processing is Open Source Software. The PDE (Processing Development Environment) is released under the GNU GPL (General Public License). The export libraries (also known as 'core') are released under the GNU LGPL (Lesser General Public License). There's more information about Processing and Open Source in the FAQ and more information about the GNU GPL and GNU LGPL at opensource.org. Please support Processing!