I tried to upload sketch to my RFDuino. I can select the RFDuino port. But I can't upload cos I can't select the RFDuino board.
I followed the installation steps listed here but I don't see RFduino package in Board Manager after I finished the steps above.
I am using Mac Mojave and Arduino IDE v1.8.9. I have tried it with v1.6.6 but results the same.