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Mac will not recognize usb device

Jan 10, 7: Right after Reboot, the flash drive was magically getting recognized. Thank you! Jan 11, 2: I have the same problem This is very frustrating. Tried to reset the SMC few times. Not sure if I am doing it correctly. Thi sis very poor from apple to have us trying to fix this problem ourselves. Jan 11, 3: Press and hold the three keys directly adjacent to the fn key in the lower left of the keyboard: Shift Control Option.

Jan 11, 4: Dear Grant Thanks for approach above. I have done this now on the left hand side keys. I have an mac key board. The external hard drive is visible in my disk utility now. However, it does not want to mount when I right click on name and select mount. Something weird happing here with this High Sierra or is it low sierra They do work fine on my Mac air which have Sierra on it. Be sure you select Device-View so that you see them listed by Hardware-name. The Volume-view is too simple for this problem. Communities Contact Support. Sign in. Browse Search. Ask a question. User profile for user: Notebooks Speciality level out of ten: Is there a trick or workaround?

More Less. All replies Drop Down menu. Loading page content. Desktops Speciality level out of ten: Reply Helpful Thread reply - more options Link to this Post. For anyone else with this problem after upgrading, here are two useful sites: Tata Tata Peripherals Speciality level out of ten: The first three are shown in DeviceView, the rest three do not appear.

My seemingly non-working USB port now recognizes my devices. So, this worked for me and my USB started working again, what a relief! Hi Guys, after reading all the responses, first off, if the above stated solution works, then good. Now, some responses were, that one should throw the logic board in the trash, bad idea.

Easy solution, replace all the filters for each port or just the ones on the data line. USB ports fixed. Yes this is quite technical and maybe only suited for an electronics engineer, but I am not and I can do it. These kind of repairs are easier than one would think, there is still hope. Can you make a video on this?

Or at least a very detailed photo-document? Thank you so much! I have a razer driver that was not working but now works, and my drawing tablet works now!!! Luv u!

This worked like a charm for me, thanks. Thanks so much!! I thought I was going to have to pay apple to fix it since I didnt have apple care! Thanks so much. Wow—this totally worked!!

How to Reset USB Ports on Mac Laptops

Your advice saved the day. Both ports stopped working and I needed to use them for a deadline project. So I had the same problem with USB ports not working on a macbook pro. I tried restarting the computer, updating software None of that worked. The screen flashed white and gave the start up sound then went back to black four times before I let it go, then I started the computer and logged back in as normal to find the USB ports working.

Or just, you know, call apple. Fixed my problem in about five minutes. Renae, this is very helpful information, thanks for reporting exactly what worked for you to fix your MacBook Pro USB ports when they were not working! Thank you SO much! Thank you! Resetting SMC worked for me. I panicked for about two hours after my USB port stopped reading my devices.

The light did change color on the power adapter. Is there any reason as to why that would be? Is it possible it still reset? I have a problem regarding with my mouse Razer Krait edition. I have already installed razer synapse in order for this thing to function properly but still it will not suddenly work few minutes after i plugged the device in the right usb port of my macbook.

Solved: USB Flash Drive Not Showing Up On Mac - EaseUS

I tried to switch it on the other side but still the problem is the same. How can i manage this problem? Will you please guide me? Same thing for my card reader if I use that instead of connecting the camera. This worked for me as well — yeesh I wish I had looked this up sooner, been living with only one port for a while now.

Mac USB Ports Stopped Working? It’s Likely Easy to Fix

Thanks Alot Mac, Tested continity of the filters and they came back OK but obviously the resisitance had changed. Also There was 5v going to the USB and the data lines went from 0. Im having problem with my macbook pro 13 inch early The problem im facing is that both of my usb port gives out power, for e. Is that overprice and should i attempt on repairing it myself by getting the the replacement of the ports on ebay or amazon?

Part 1. Fix USB Flash Drive Not Showing Up on Mac

Thanks guys! Took a couple of restarts before I got it right but it worked. This worked like a charm guys! Worked on my Mac Pro Then when releasing buttons, it changed to green briefly then back to orange because it was not fully charged. Thought I did it wrong first time so repeated the process; same observation.

My mouse is a cheap Logitech. And I was sure the USB port was not working by testing w the printer input cable between my two ports. None of these resets worked. Any ideas? What sort of Apple-paid hack are you?


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Admit it. Actually USB usually does work. Usually means under normal conditions. So, under normal conditions, USB would work fine.


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But under abnormal conditions, USB may not work or stop working on a Mac, or any other computer. Brilliant thank you. I thought it was broken and bought a cheap new one which wrecked everything. Worked like on a charm on my Macbook Pro! My USB ports had stopped working. Took just a few minutes and I am back in business. Still only one of them working on my early MacBook Pro.

I tried the PRAM reset, too. Anyone else have this issue? Late MacBook Pro 5,1.