Using iPhone 7 with OS 10.15.7 Catalina
Plugged in iPhone 7 version 14.4 to desktop iMac. Got message a software update is needed. But it doesn't say what software that is. If it's a simple software upgrade, OK. But if it's Big Sur, no. And why would I need that anyway for this relatively older but up to date iPhone?
iMac 21.5″, macOS 10.15