System Requirements

CPU Requirements

To run Thermo-Calc versions 2017b and newer, the CPU needs to support SSSE3 instructions. Read about this instruction set. Learn what architectures support what instructions.

The Software is Supported on the Following Platforms

Windows

Software	64-bit
Thermo-Calc	Windows 11
Diffusion Module (DICTRA)	Windows 11
Precipitation Module (TC-PRISMA)	Windows 11
TC-Python*	Windows 11
TQ-Interface*	Windows 11
TC-Toolbox for MATLAB^®* **	Windows 11

*Additional system requirements can be found in the SDKs section at the bottom of the page.

**We support MATLAB 2021b up to MATLAB 2026a. Older versions are not possible to use.

Windows 10 Support Discontinued

Support for installing and running the Thermo-Calc software package on Windows 10 was dropped at the 2026b release in alignment with Microsoft’s Windows 10 end-of-support announcement. Users with Windows 10 are therefore advised to migrate to a newer operating system.

Linux

Software	64-bit
Thermo-Calc*	Red Hat Enterprise Linux (RHEL 10) Red Hat Enterprise Linux (RHEL 9) openSUSE 15.6 (Leap) Ubuntu 24.04 (Noble Numbat)
Diffusion Module (DICTRA)* **	Red Hat Enterprise Linux (RHEL 10) Red Hat Enterprise Linux (RHEL 9) openSUSE 15.6 (Leap) Ubuntu 24.04 (Noble Numbat)
Precipitation Module (TC-PRISMA)	Red Hat Enterprise Linux (RHEL 10) Red Hat Enterprise Linux (RHEL 9) openSUSE 15.6 (Leap) Ubuntu 24.04 (Noble Numbat)
TC-Python***	Red Hat Enterprise Linux (RHEL 10) Red Hat Enterprise Linux (RHEL 9) openSUSE 15.6 (Leap) Ubuntu 24.04 (Noble Numbat)
TQ-Interface* ***	Red Hat Enterprise Linux (RHEL 10) Red Hat Enterprise Linux (RHEL 9) openSUSE 15.6 (Leap) Ubuntu 24.04 (Noble Numbat)
TC-Toolbox for MATLAB^®	Not available

*X Window System is required for the graphical installer.

**X Window System is required for plotting.

***Additional system requirements can be found in the SDKs section at the bottom of the page.

Mac (macOS)

Software	64-bit
Thermo-Calc	macOS Tahoe (26.x)* macOS Sequoia (15.x)*
Diffusion Module (DICTRA)	macOS Tahoe (26.x)* macOS Sequoia (15.x)*
Precipitation Module (TC-PRISMA)	macOS Tahoe (26.x)* macOS Sequoia (15.x)*
TC-Python**	macOS Tahoe (26.x)* macOS Sequoia (15.x)*
TQ-Interface**	Not available
TC-Toolbox for MATLAB^®**	Not available

* Works with Rosetta 2 emulation on all M1, M2, and M3 Macs (2020, 2022, 2023)

If you are running macOS 27 and receive a notification that Rosetta is required when installing Thermo-Calc, cancel the installation, install Rosetta, and then restart the Thermo-Calc installation. Note that we do not officially test or support macOS 27 for any current Thermo-Calc versions.

**Additional system requirements can be found in the SDKs section at the bottom of the page.

mac15.1 Patch for Thermo-Calc 2020b to 2024b

It has come to our attention that Thermo-Calc versions 2024b and older do not work on macOS 15.1. Although we do not support these versions of Thermo-Calc on macOS 15.1, we want to make Thermo-Calc as accessible to our users as possible, so we have developed an app to patch the issue for versions 2020b to 2024b. Thermo-Calc versions older than 2020b do not work on macOS 15.1.

The download file includes an explanation of the issue and instructions on how to run the patch.

Download the Patch

Discontinued Platforms

Below are the previous and upcoming platforms that we have dropped support for.

Support for installing and running the Thermo-Calc software package on Windows 10 was dropped with the Thermo-Calc 2026b release in alignment with Microsoft’s Windows 10 end-of-support announcement. Users with Windows 10 are therefore advised to migrate to a newer operating system.
Support for installing and running the Thermo-Calc software package on Windows 7 and Windows 8 has been dropped as of the Thermo-Calc 2021b release. Users with Windows 7 or Windows 8 are therefore advised to migrate to a newer operating system.
Support for installing and running the Thermo-Calc software package on all 32-bit platforms has been dropped as of Thermo-Calc 2018a. Users with a 32-bit platform installation are therefore advised to migrate to a 64-bit platform.

Roadmap for Platform Support