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When plugging into the usb ports, a popup window says it has been disabled because a device is using too much power. I’ve tried resetting the SMU, PRAM, disconnected the battery for 10 minutes. Nothing works. The only other advice I’ve read is that the logic board may need to be replaced. What can I do short of replacing the logic board.
Hello Ben….as u see below, there are two different SMC resets. It depends on wether u have a removable battery or not. Reset the SMC of a MacBook or MacBook Pro’s with detachable batteries: Shutdown the MacBook/Pro and remove the batteryDisconnect the power adapter, hold the Power Key for 10 secondsRelease the power key and reconnect your battery and power adapterTurn your Mac onLet boot as usual. Reset SMC of a MacBook or MacBook Pro’s with an internal battery: Shutdown your MacBook/ProConnect the power adapter to your MacOn the MacBook/Pro’s keyboard, hold down the Shift+Control+Option keys and the Power button at the same timeRelease all keys and the power button at the same timeBoot your Mac as usual Make sure that you are performing the correct SMC for your machine. If this doesn’t work; I would create a new user account and see if the problem persists, before jumping into a repair. If this doesn’t help; you might need to replace the I/O Board of your machine.
Hey everyone, I tried resetting SMC as well both ways and still nothing. Odd thing is that my usb ports work for everything EXCEPT my “Focusrite Scarlett” interface for recording music in logic. Anybody else have this similar problem??
Different ports have different power levels. Try the other ports
My mouse has been working for ages and suddenly my mac does the same thing i tried different mouses none of them works and pops up “unplug the accessory using too much power to re-enable usb devices” whats happening!
Hello BEN… i have exactly the same problem … i try a lot of things and nothing works, please let me knows if you fix this and how… thanks in advance
Heys, I have an Macbook Air and I am having the same problem, getting the message USB Accessories Disabled, but I have nothing connected, it started yesterday and the last thing I connected was my iPhone 2 days ago … I tried the solutions above (reseting SMC, PRAM, safe mode), none of them seems to work, when I use it on normal mode still have the message. Any ideas/solutions?
What if you’re getting this on your iMac (desktop)? I have a mid-2011 iMac and getting the toaster message ‘“USB Accessories Disabled. Unplug the accessory using too much power to re-enable USB devices.” I have no idea what accessories it is referring to, all i have plugged in is keyboard and two ext hard drives which have been fine for the previous 2 years.
Nope - didnt work. No ports makes it useless to what i need this mac for. What’s going on with the quality of these in the past 5 years in here? I only use it for business matters so nothing major and it still has stuff going wrong…so strange. My old mac lasted me for like 8 years. Replaced it and this is my second in 4 years so not happy to see them breaking down so easily. Hope they can fig out why this is happening. Will check back in hopes of another solution other (other than a board replacement). Don’t have time to have my computer in a shop for a couple of weeks…bummer
I have a mac book air from maybe 8 years ago but it works fine until today. I had my huion pen tablet plugged in and the usb accessory is using too much power message popped up. Anything other than the pen tablet seems to work so i don’t know what’s happening. Would be grateful for any help. Thanks!
same for me! I have mouse that don’t work but all my other mouses work!
The same thing was happening to me as i was researching the answer. None of the solutions such as Shut down Mac, hold Command option shift and power button or command option P R and holding power button for 20 sec helped.. meanwhile my mac was on charge and about 40% full… as i was researching, it suddenly switched to the external display (which is the problem for me) by itself (it was plugged in all the time) once the charge reached 50%… its strange because i haven’t read about it on any apple website or support forum and i checked all of them. this is how i resolved it . macbook pro 2016 touchbar 13inch.
hello, my mac has disabled all the usb, and after the battery is completely discharged, now i can no longer turn it on again because it has the usb blocked and the charger cannot charge it … what should i do?
Just started having this problem on my 2017 Macbook Air with the left USB port. Resetting SMC and NVRAM does nothing. However, when I boot into Safe Mode, the USB port works. I’ve wiped the system several times and reinstalled the OS, and that pop up window still comes up (even with nothing inserted in the port). Anyone have an idea on what to try? Thanks
