Download
CatOS is distributed as an ISO image. The current release is CatOS 2026.08.05, available as a standard image and an NVIDIA image. CatOS 2026.07.19 remains available further down this page.
After downloading, verify both the filename and the SHA-256 checksum.
Choosing the correct image
The main difference is the NVIDIA driver and boot environment. Choose based on the discrete GPU actually installed in the machine. On a hybrid-graphics laptop, the presence of an Intel or AMD integrated GPU does not change the choice: use the NVIDIA GPU model to decide.
| Graphics hardware | Recommended image | Notes |
|---|---|---|
| Intel or AMD graphics only, with no NVIDIA GPU | Standard image | No NVIDIA-specific boot or driver setup is required. |
| GeForce GTX 10 Series or older | Standard image | These cards predate the GTX 16 Series and are outside the modern NVIDIA range targeted by the NVIDIA image. |
| GeForce GTX 16, RTX 20, RTX 30, or RTX 40 Series | NVIDIA image recommended | GTX 16 and RTX 20 are Turing, RTX 30 is Ampere, and RTX 40 is Ada Lovelace. The standard image can usually still boot to the desktop, but the NVIDIA image is the preferred choice for installation and regular use. |
| GeForce RTX 50 Series or newer | NVIDIA image required | RTX 50 uses the Blackwell architecture and requires the modern NVIDIA driver and boot environment included in the NVIDIA image. |
In brief:
- No NVIDIA GPU: use the standard image.
- GTX 10 Series or older: use the standard image.
- GTX 16 / RTX 20 through RTX 40: prefer the NVIDIA image; the standard image can usually still reach the desktop.
- RTX 50 or newer: the NVIDIA image is required.
On an existing Linux system or in a CatOS live environment, run:
lspci -k -d ::03xx
On Windows, open Device Manager and inspect Display adapters. On a hybrid-graphics laptop, check both the integrated and discrete GPUs instead of looking only at the GPU currently driving the display.
Driver packages and support status differ between NVIDIA architectures. See the ArchWiki NVIDIA page for the full architecture and driver matrix and troubleshooting guidance.
CatOS 2026.08.05
See the CatOS 2026.08.05 release notes for the main changes in this release.
Standard image
Filename:
catos-2026.08.05-x86_64.iso
SHA-256:
b7611e316dbcd56e56ed2319274400f91d03fe1c0ab012499b125d9c7495a296
Download:
NVIDIA image
Filename:
catos-for-nvidia-2026.08.05-x86_64.iso
SHA-256:
c943c4561de6fc06285280a5948e0e515ae833205854768787f915eb772f4856
Download:
Previous release: CatOS 2026.07.19
Standard image
Filename:
catos-2026.07.19-x86_64.iso
SHA-256:
5543f37bbe0c96eee1753a99012d9d5cb56e007ee0ab5aada1883ae4d1553b16
Download mirrors:
NVIDIA image
Filename:
catos-for-nvidia-2026.07.19-x86_64.iso
SHA-256:
a1d2808c43e33054d6d2099c91c076a8d44c3d90aefc3f8bfa2845b1ec1d38e7
Download mirrors:
Verify the image
On Linux, run:
sha256sum catos-2026.08.05-x86_64.iso
sha256sum catos-for-nvidia-2026.08.05-x86_64.iso
sha256sum catos-2026.07.19-x86_64.iso
sha256sum catos-for-nvidia-2026.07.19-x86_64.iso
The output must exactly match the SHA-256 value shown on this page. Do not install an image that fails verification.