Microsoft's advice is to upgrade macOS to Mojave or Big Sur 'for the best user experience and longest support lifecycle.' After all, the impending arrival of macOS Monterey, which was shown during Apple's WWDC in June, will mean support for Mojave will be on the line if Microsoft makes good on its promise to only support the current and previous three versions of macOS for OneDrive sync. There is therefore no guarantee how long it will work past the 10 September cut-off date. You also won't be able to install it fresh. Microsoft will simply no longer update or test it. That said, the app will not suddenly stop working on existing systems. Now Apple emits dozens of fixes for iOS, macOS, etc
It is entirely OK ,to pick the exact same location. From here you can restart the setup wizard to map out where the OneDrive you’d like to be positioned on your Mac.
Apple's own cloud storage service, iCloud, is hard to avoid if one uses an iDevice, but for many enterprises (and a few consumers) the OneDrive sync app is a useful tool and will be missed by customers not on Apple's latest and greatest. If you are unable to restart the setup wizard within the OneDrive already on your Mac, then you need to delete the app from Dashboard and re-install OneDrive from Mac App Store.
