17,1 iMac 10.12.6 w Fusion Drive Tonite I wanted to reinstall Sierra 10.12.6. So I chose to hold Apple+Option+R, then rebooted. The installer window then asked me to CONTINUE to install High Sierra. I stopped. I rebooted, holding Apple+R, and was asked to install Sierra. I stopped to ask the forum a question: Why would I be asked to install High Sierra on a Fusion Drive? What is the difference in the two key combinations? Normally in the past, I thought either key combo would allow me to install the latest system, for my iMac. Has that changed?