Multimedia & graphics macOS
Siril for macOS
Calibrate, align and stack astronomical images with Siril for Mac, a free, open-source processor for deep-sky photography and image analysis.
- Operating system
- macOS Ventura 13 or later
- Architecture
- Apple Silicon (ARM64)
- Download package
- DMG disk image
This direct download is the Apple Silicon build. A separate Intel x86_64 DMG is available from the publisher. At least 8 GB RAM and an SSD are recommended.
Link checked · Download guidance
What is Siril?
Siril turns a sequence of astronomical exposures into a stacked image that you can refine for publication or analyze. It provides calibration with bias, dark and flat master frames, image registration, stacking with outlier rejection, colour calibration, deconvolution and histogram stretching. You can control the steps manually or automate a workflow with scripts. FITS image sequences and SER videos are supported, alongside tools for astrometry and photometry.
This entry links to the publisher’s Siril 1.4.5 DMG for Apple Silicon Macs. It requires macOS Ventura 13 or later; Intel Macs need the separate Intel package linked on the publisher’s download page. Automatic processing is not a substitute for checking your data: official scripts assume particular calibration frames and may need editing when your captures differ.
The screenshot is an older Siril interface example from the publisher’s documentation, showing version 1.1.0 on Linux. It illustrates the application workspace, not the appearance of the current macOS release.
What it offers
- Calibrate exposures using bias, dark and flat master frames.
- Align and stack image sequences, with outlier rejection to reduce noise.
- Refine stacked images with colour calibration, deconvolution and histogram tools.
- Process FITS sequences and SER videos manually or with scripts.
- Analyze astronomical images with astrometry and photometry tools.
Good to know
- Siril 1.4.5 for macOS requires Ventura 13 or later; the linked ARM64 package is for Apple Silicon, not Intel Macs.
- Official processing scripts assume suitable calibration frames; missing or different input frames can require a modified script.
- Large image-processing jobs consume substantial RAM and storage bandwidth; the publisher recommends at least 8 GB RAM and an SSD.
Product images
Sources
References used for this listing. Retrieval dates do not indicate hands-on testing.
- Siril for Mac - Download ↗Retrieved
- Siril — astronomical image processing ↗Retrieved
- Siril 1.4.5 — release notes ↗Retrieved
- Siril — FAQ ↗Retrieved
- Installation — Siril documentation ↗Retrieved
- Welcome to Siril’s documentation — Siril 1.4.4 documentation ↗Retrieved
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