Chosen Solution
So I’ve made a stupid mistake by messing around with Terminal trying to fix a dodgy USB stick. I entered some commands such as “diskutil eraseDisk HFS+ newdisk disk2” from this website http://hints.macworld.com/article.php?st…, trying a few different options without fully understanding what I was doing. Now anything I plug into either USB 3.0 ports gets the message “The disk you inserted was not readable by this computer”. USB drives and hard drives that worked before now no longer work. I’ve tried resetting SMC and PRAM to no avail. Would rather not format the whole system as I can’t do a more recent backup to HDD beforehand now. But if it comes to it, will this fix the problem? Can someone tell me what commands to enter into terminal to set these ports back to what they were before I started messing with it?
sudo kextunload IOUSBMassStorageClass.kext; sudo kextload /System/Library/Extensions/IOUSBMassStorageClass.kext There are other better more effective ways to do this outside of terminal but I assume you cant get into the computer in the first place otherwise you wouldnt be asking for a terminal command.
The USB doesn’t work, so I cant use any key combination. I thought there might be a way to use the on/off button without rebooting it? Currently I try to use bluetooth mouse and keyboard to type resetusb (after adding to the profile: alias resetusb=‘sudo launchctl stop com.apple.usbd; sudo launchctl start com.apple.usbd’) as someone suggested.
