TurboTax is aware of this.
You can use the TurboTax online editions for tax year 2019 when they become available in early December - https://turbotax.intuit.com/personal-taxes/online/
TurboTax minimum system requirements for Mac - https://ttlc.intuit.com/community/system-requirements/help/minimum-system-requirements-for-turbotax-...
TurboTax minimum system requirements for the online editions - https://ttlc.intuit.com/community/system-requirements/help/turbotax-online-system-requirements/01/25...
