Good afternoon. I had an update a few nights ago that didn't go through properly and seems to have messed some things up. The main issues I've seen is that Messages will only show me texts from iOS devices and that my saved safari usernames/passwords vanished. The usernames and passwords I can deal with and just save them again as I log into stuff. The Messages issue is driving me nuts as I use that app a lot. I've searched around online and tried a few options, but nothing seems to get my texts from non-iOS users to show up on my Mac anymore. This worked prior to the update a few nights ago, and I didn't alter any settings to possibly cause this. Any advice to get Messages working properly again? If Messages can't get going properly again, my next thought was to reinstall the Mac OS to hopefully fix the application. As Messages is a bundled application, I don't know of any other way to reinstall it. When I try to boot into recovery mode with command + r, the computer just boots up normally. I also tried holding option while booting and this doesn't get me into the disk select mode either. Not sure what's going on here. Am I doing something wrong trying to get into recovery mode this way, or is it different in High Sierra? My last thought was to download High Sierra from the Mac App Store. If I download and install it that way, will that do an OS install saving my data, or will that force a clean install? Any help with these issues would be greatly appreciated. Thank you for your time. Model: iMac MB950, Late 2009 21.5", High Sierra.