Deviot looks promising, but last time I checked platformio/deviot doesn't support uploading to teensy on OSX.
https://github.com/apmorton/teensy-template (teensy 3 only) works almost flawlessly on mac. Also supports uploading by adding a custom build system to ST that includes 'make upload'.
https://github.com/apmorton/teensy-template (teensy 3 only) works almost flawlessly on mac. Also supports uploading by adding a custom build system to ST that includes 'make upload'.