Trying to update software and constantly getting message that wifi connection is lost - but it's connected
I'm using Mojave and trying to update my software, (safari, security, Big Sur). Doesn't matter what I do- I get the message that "network connection is lost" (but it's not). In the meantime, it's running really slowly, programs are freezing constantly and basically anything I try to (just basic stuff) is barely working.
This technophobic lady is stressed out. Fortunately I see that I have Apple Care for another 11 months.
I'm using a Mac Powerbook 13" OS 10.14.6
MacBook Pro 13″, macOS 10.14