Intuit TurboTax Basic 2016 Fed + Efile for Mac - Download Operating Systems Supported: Mac OS Packaging: Download System Requirements: Processor: Multi core Intel Processor with 64-bit Support. Monitor: 1024x768 screen resolution. RAM: 1 GB Operating System: Mac OS X v10.9 or later [64-bit required]. Hard Disk Space: 650 MB for Federal product Internet Connection: 56 Kbps modem (Broadband connection highly recommended). Required for product updates. Printer: Any Macintosh-compatible inkjet or laser printer. CD/DVD drive required.