TaxCalc is either ‘fully supported’, ‘partially supported’ or ‘unsupported’ running on the configurations of operating system as listed here.
TaxCalc is optimised to work on the specified versions of these operating systems and all releases are tested on them. Please note those marked with a * have additional information below.
Apple Mac (64-bit Intel processors only)
We fully support customers with TaxCalc queries encountered when running on these configurations and we endeavour to correct any issues that emerge.
Appropriate hardware is required to run any operating system.
* Please note that the operating systems below are no longer supported by Microsoft or Apple, or support is soon to end. Whilst they are currently supported by TaxCalc, this cannot be guaranteed and is on a best efforts basis. TaxCalc would strongly recommend upgrading your operating system if you are using one of the following:
** Catalina users may experience a message saying that Apple cannot check the application. In this case please refer to our Knowledge Base article, Issues installing TaxCalc on Catalina.
For more information on our unsupported operating systems, please see our Knowledge Base article for Retired Operating Systems
These operating systems may no longer be supported by their suppliers making them vulnerable to security threats and we strongly recommend that all customers move to a fully supported platform immediately.