Gem Imager 1.0 is out

The tool that writes operating system images to an SD card or the on-board eMMC has reached its first stable release.

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Top-down view of the T3 Gemstone O1 board, with the microSD slot and the on-board eMMC along its edge — The two targets Gem Imager writes to: the microSD slot on the edge of the board, and the 32 GB eMMC on it.

22 July 2026

Release

Gem Imager is the desktop tool for picking a T3 Gemstone O1 system image and writing it to an SD card or the on-board eMMC in a single step. Version 1.0 runs on Windows, Linux and macOS with the same interface.

The image list now updates from inside the application, the downloaded file is verified before anything is written to the card, and the card is ejected automatically once the write completes.

Installation steps and the full list of supported images are in the documentation.

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