: Windows 7 (32/64-bit), Windows 8.1, or Windows 10 (specifically M050). Windows 11 is not officially supported for this legacy version.

: If you are an existing customer with a valid maintenance contract, you may still be able to download maintenance releases (like Mathcad 15 M050) through the PTC Support Portal .

: Since early 2022, PTC no longer sells or distributes Mathcad 15 or versions of Mathcad Prime earlier than Prime 7.

: Microsoft .NET Framework 4.5.1 and Internet Explorer 6.0 or later. Key Features of Mathcad 15