Hello. I just found that few of my devices requires more power, then my iMac giving to those devices. It is USB 1.1 device Novation Launchpad MK1 and external card USB 3.0 card reader. On launchpad all led are dimmed and software loses it all the time. USB card reader reported that it is disconnected very often.
All these devices working flawlessly on my old MacBook Pro 2012.
How can I adjust power settings for USB devices?
iMac 18.2
MacOS 10.13.6
It's not a problem at all, the devices you have require a specific amount of power, you need a USB hub that can deliver what they need. Powered USB hubs are not expensive or difficult to use, simply choose one and move forward.
You cannot however you can get a Powered USB hub and connect the devices to that.
So, this is problem of iMacs? Or it is a problem if my iMac? Can anyone from Apple company reply to me in details?
Thank You.
IO did PRAM and SMC reset.
Did not help.
I am just wondering is it my iMac problem, or is it all 18.2 iMacs?
Thank you.
I'd think if it was all 18.2 iMacs we'd see 1,000s of reports, so my guess is it's just yours right now.
Thank you, I did checked that.
So, for launchpad:
Required 430
Available 500
Extra Operating current 0 mA
(and as I see it is not working as it has to work, so, Mac giving less than 430 mA)
for the card reader:
Required 896
Available 900
Extra Operating current 0 mA
The same problem. Continuously loosing connection and reporting about disconnecting media.
Forgive me...
Have you done a PRAM reset, CMD+Option+p+r...
http://support.apple.com/kb/HT1379
In fact, do 3 in a row, takes a bit of time.
Intel-based Macs: Resetting the System Management Controller (SMC)...
Apple won't reply here, just us other users.
Could the cables be old & frayed internally?
What does System Report>Hardware>USB report for mA ???
USB Power questions. Please help.
