Each version of Siril are distributed for the 3 most common platforms (Windows, MacOS, GNU / Linux) and can be downloaded on the Siril website. But of course, as Siril is a free software and you can build the application from the sources.


It may be useful to check the integrity of the binary or package you have just downloaded. The list of SHA checksum is available on this page, in json format.

At the end of the installation you can try the capabilities command to learn more about your installation.

Siril command line

Lists Siril capabilities, based on compilation options and runtime

Understanding Siril version numbers

Starting with 1.0 version, stable versions of Siril (such as 1.0, 1.2, etc.) are indicated by even numbers and are designed for everyday use. Development versions, indicated by odd numbers (such as 0.99.0, 1.1.0, etc.), are not usually available as packages or binary executables, and must be compiled by the user. The third and last number, called micro numbering, corresponds to the number of releases that brought bug fixes and other small contributions (such as 1.0.1, 1.0.2, 1.0.3, etc.).

Minimum System Requirements

To ensure optimal performance, it is recommended that your system meets the following minimum specifications:

  • RAM: At least 8GB of RAM is recommended for all systems to ensure smooth operation. Higher RAM capacity is beneficial as Siril utilizes available RAM extensively for processing tasks.

  • Storage: An SSD (Solid State Drive) is highly recommended for faster read/write speeds, resulting in order-of-magnitude faster execution compared to traditional HDDs

Specific platform requirements are as follows:

  • Windows: Windows 8.1 or later.

  • macOS: macOS 10.15 Catalina or later.

  • GNU/Linux: No specific minimum requirements stated. Typically, any modern distribution should suffice.