What Mac OS version do I need for Turbo Tax Deluxe?
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Below are the minimum requirements for TurboTax Federal 2018 software installed on a Mac computer.
ProcessorBelow are the minimum requirements for TurboTax Federal 2018 software installed on a Mac computer.
ProcessorThe TurboTax software for tax year 2018 requires Mac OS X v.10.12 or later (64-bit required)
See this TurboTax support FAQ for Mac minimum system requirements - https://ttlc.intuit.com/questions/1899173-minimum-system-requirements-for-turbotax-mac-software
If you cannot upgrade or do not want to upgrade your Mac OS then you can request a refund of the software purchased from TurboTax using this website - https://support.turbotax.intuit.com/forms/refund-request.jsp
You can use the TurboTax online editions - https://turbotax.intuit.com/personal-taxes/online/
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