It just dawned on me that my iMac doesn't seems to remind me to update the OS. When I found out from my friend who's also a Mac user that his iMac is now on Mojave 10.14.13. I immediately got on it and tried to install Mojave but my computer said "sorry cannot install in this computer." I have iMac version is Mid-2011. So is this the end of my iMac life as far as updates? Is there a way around it to update to Mojave? I checked compatibility, it seems that iMac is too old. I'm happy with the way it runs with High Sierra right now, but I'm the type of person that who's always up to speed with updating my iMac. Does anyone has a solution for me?