How come I have to hold down alt when my iMac boots after removing the Windows partition?

by on October 12, 2011

Q: Hi, I removed windows partition from my iMac by Boot camp, everything is O.K. but when I start my iMac I have to hold “alt” to choose Macintosh HD otherwise it says “error choosing operating system”. How can I solve this problem?


2 Responses to “How come I have to hold down alt when my iMac boots after removing the Windows partition?”
  1.  
    Picked as best answer

    Try this:

    System Preferences > Startup Disk, and choose Macintosh HD and click on “Target”

     
  2.  

    Thanks it helped.