Hello @planet
I am running an updated MacBookPro18,1 w/Apple M1 Pro, and I’ll likely upgrade to a M4 successor when the time comes. I am fine with the newer technology.
If that laptop (MacBookAir9,1 ?) had a good Internet connection all along, and was presumably running macOS Sonoma 14.7.5 in mid September 2024, wasn’t an update to macOS Sequoia 15.0 offered back then?
Regardless, isn’t the current macOS offering to update now when the Internet is connected?
HTH