I don't know if I am describing this properly, but some time ago, every time I reboot my iMac it does not boot straight to the log in page. Instead it brings me to a screen that shows my 3 partitions (Mac, Recovery, and Boot Camp) and below that it shows my wireless network. In order for me to boot to my Mac I have to click on the arrow under that particular partition. I would like for this to go away and boot straight to my log in page. Thanks in advance.