질문: "The managed object model version...
Every time I turn on my devices, I have this popup window in my MacBook Pro and iMac: "The managed object model version used to open the persistent store is incompatible with the one that was used to create the persistent store." What does this message mean? and what can be done to resolve the error?
Seoul, South Korea
MacBook Pro, macOS High Sierra (10.13.4), also with my iMac, a desk PC