Hi, a Makefile is the script that is used by the IDE to build your sketch.
Are you doing anything special to customize the Hologram package in the IDE or have you just done the basic install in the board manager?
We strongly recommend using 0.10.5 now as you'll have a lot of weird problems if you don't and the latest firmware has other solutions for passing AT commands through to the modem.
You shouldn't be having any build issues within the Hologram package if you haven't edited anything. It might be because you are on an old version of the Arduino IDE. Can you try upgrading your IDE to 1.8.4 and see if that helps?
Other things to try if that doesn't work:
- uninstalling the Hologram package in the boards manager and reinstalling it
- exit the IDE, completely delete your Arduino IDE profile directory (looks like
/Users/xxx/Library/Arduino15 on your system) and then start the IDE again and add the Hologram URL into preferences and reinstall the package from the boards manager