Turning on “Portable Wi-Fi hotspot” (Settings > Wireless & Networks > More > Tethering & portable hotspot) I can see the phone in the list of networks on macOS, but when I select it, the laptop can’t connect (just keeps the animated wireless symbol).
I have tried several macbooks, with and without encryption and tested another Android phone on two of the machines which worked fine.
Well, for starters, the symbol you uploaded shows a terrible signal. Keep the Macbook closer to the phone, and it should improve. Possibly, there’s interference. Try to use 5 GHz instead of 2.4 GHz (legally, tho, make sure you’re indoors). You can run Wireless Diagnostics on the Mac, and from there go to Window and you have 6 options: Assistant, Info, Logs, Scan, Performance, Sniffer. Performance shows you continuous graphs of things like RSSI and noise, Info shows connection info. I can also recommend Network Utility, a user-friendly frontend for various CLI tools such as ifconfig, netstat, ping, etc. At the very least it will show you at the info tab transfer statistics. Alternatively, you can use Bluetooth or USB for tethering.
Are you sure the FP2’s portable Wi-Fi hotspot really operates in the 5 Ghz band? Did you check with a connected device or Wi-Fi scanner app? For me it always stays on 2.4 GHz, even when switching to 5 GHz. I’ve reported this as a bug ages ago.