Unwanted plus sign
Older iMac has suddenly started inserting + sign when hitting space bar. Sometimes + sign will continue self entering. Sometimes switching to different usb port will clear issue. Sometimes it will not. This is intermittent. Once cleared it will work for awhile before starting up again. Have restarted, etc. Also tried startup while holding command,option,P, and R mentioned on another forum entry. This is the original wired keyboard received with the mid 2010 MAC. Anyone else have this issues or a fix. Next step is to get another keyboard but not sure if that is the issue.