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Modello fine 2011, A1278 / processore i5 2,4 GHz o i7 2,8 GHz

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SMC Firmware disabled USB ports

I use this PC as my DJ computer. I rely on working USB ports to work with my controller/mixer. I WAS running Yosemite (as I dont trust sierra and beyond). To get ready for the most recent gig I ran updates. In my experience with apple keeping the base OS the same and running updates takes care of issues without killing performance, at least until now.

I ran the updates and the USB ports no longer work. I have done SMC resets, I have cleared the NVRAM(PRAM). The MBP is running SMC 1.68f99. Now where I feel 99% sure that apple screwed me in the update vs just a hardware failure at the logic board. When I search for information on the SMC I found a downloadable from apple with the firmware as 1.68f98. I dont know what firmware it was on previously because I didnt think to check it before updating. whoops i trusted apple.

My thought to fix would be to downgrade but the only how to I have found has the use of a bootable USB device…which I cant use since the USB ports dont work. I thought about using a thunderbolt to usb adapter but there are only like 2 out there and theyre $80…wtf isnt older tech supposed to get cheaper.

Does anyone have a solid way of downgrading the SMC version. Also I am currently running HighSierra as I thought an OS update would solve the issue. WRONG. I am open to the idea of replacing the Logic Board but I would really like to try to get the SMC rolled back to rule out software before hardware.

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Try starting up in Safe Mode (hold down the Shift key on start up). If they are working now, you may have picked up a virus. Very common on DJ’s machines because of questionable sources of music downloads. Use a good “Paid For” antivirus to clean it. I use Symantec Endpoint Protection. Get rid of any “Clean my Mac, Fix my Mac, Keep my Mac programs as you have no idea of what those programs are doing.

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I must admit I am smacking myself in the head for not remembering to try safe mode of everything I have done thus far. But the music sources are not much of a concern as I do purchase my music from legit sources and Everything I aquired before building my library is on my other macs including my 2007 Macbook which does still function properly just old, as well as my Mac Mini(2014revision). But I will for sure check safe mode.

da

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