I am being interrupted multiple times a day by a mysterious dialog box that says:
"OS X 10.13 is not supported. There is an update but you are on OS X 10.13 or an earlier version. Upgrade to the latest version of macOS to install it."
While I was considering doing the OS update soon, this dialog has actually caused me to hesitate, because I can find absolutely no documentation for it. A google search gives only a single hit, and that is in French. I am a bit concerned that this could be evidence of malware- perhaps, for example, the running an update could give malware a special opportunity to get extra permissions/control of my system.
Does anyone have an idea where such a dialog could be coming from, or what app may be triggering it? Image attached.
Update: here is the one (french) link I found on the internet which may reference the same dialog box. No useful information there, as far as I can tell: