decided to have a look at InSSIDer 5 beta on an old Macbook Air […] It crashes on launch so I’m guessing the minimum pre-req for MacOS is higher ?
Yes, inSSIDer 5 beta for Mac has only been tested on macOS Catalina. For previous versions of macOS, I would recommend using your copy of inSSIDer 4.
The refresh rate for InSSIDer 4 doesn’t appear to be adjustable and it still shows SSIDs minutes after the access point has been powered off. Any way of fixing this ?
Unfortunately you must exit and re-enter the software to force a refresh. I believe we designed inSSIDer this way to try and capture and maintain as much data as possible, even for distant networks. As a result, it may display networks that are no longer there.
This might also be caused by a restriction from the WiFi scanning API provided by Apple, but I would need an engineer to confirm.
The Windows version of inSSIDer has a “time-frame” option that allows you to select a designated amount of time to display network information. I imagine this feature will eventually be available in the Mac version of inSSIDer 5, should you decide to upgrade to macOS Catalina. You can currently refresh data in inSSIDer 5 for Mac under File > Clear Data.
Let me know if you have any other questions!