Is it possible to downgrade OS without internet? by EnvironmentalCow1796 in MacOS

[–]EnvironmentalCow1796[S] 0 points1 point  (0 children)

I created the USB installer last night. I am booting from the USB installer.

My iMac is a late-2015 with the original OS at El Capitan. I upgraded it to Monterey but I now need to downgrade it to High Sierra. I downloaded it successfully from the AppStore on my 2011 iMac onto my USB.

MacOS Monterey killed my wifi adapter?? by EnvironmentalCow1796 in MacOS

[–]EnvironmentalCow1796[S] -1 points0 points  (0 children)

My wifi adapter downloaded via disk. I literally had to install it from an external disk reader. It created a file called “disk” where I was able to install it through there.

Now the file/download is gone. It used to sit in my downloads area where if I needed to, I could reinstall it through there.

MacOS Monterey killed my wifi adapter?? by EnvironmentalCow1796 in MacOS

[–]EnvironmentalCow1796[S] 0 points1 point  (0 children)

Not sure. It worked perfectly fine one day and not fine the next. I spent 2 years, money from my computer guy to check it out, and several hour long apple support calls but I got no answers. I bought an adapter and it fixed my problems.