TurboTax minimum system requirement for desktop editions - Mac - macOS Sonoma 14 or later
https://turbotax.intuit.com/personal-taxes/cd-download/tta-system-requirements/
You may still use the TurboTax online editions - https://turbotax.intuit.com/personal-taxes/online/file-your-own-taxes/
See this TurboTax support FAQ for how to request a refund for the TurboTax purchase - https://ttlc.intuit.com/turbotax-support/en-us/help-article/intuit-refunds/request-refund-turbotax-p...
