my 2010 mac pro has smc 1.39f11 which will not update to 1.5 needed for highnsierra

This Complete Upgraded Hardware Package Includes: CPU Board, Support Plate 076-1344, 6-Core CPUs, w (076-1367 & 076-1368) HeatSinks. 12-Core 3.06GHz Dual-CPU Processor Tray For 2010 2011 2012 Mac Pro Towers. When eBay Blocks Your Payment, Contact Me/Use. In July 2016 eBay Started Reversing Payments-To My Biz-Account Regardless-Of eBay Settings. I Temporarily Got-Around the Bugs by Using Different eBay Settings to Sell Inexpensive Hard-To Order-Wrong/Damage Items.

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My 2010 mac pro has smc 1.39f11 which will not update to 1.5 needed for highnsierra