New install of IDE won't upload

Hello All
It's been a while, and I decided that upgrading to the new IDE (1.6.12) would be a good thing. I can't seem to get it to upload to my Sparkfun RedBoard, which used to run fine as an UNO. If i use the old IDE (1.0.5) everything is fine, same usb cable, same port, no changes.
The loopback test for both versions of IDE work, and I can still upload thru 1.0.5

This is all running on an older macbook pro OSX 10.7.5, and the new IDE was just copied into the Applications folder.

I am imagining it's simple, but i cant for the life of me figure out what exactly

Thanx in advance
Darren

BTW The error log under IDE 1.6.12 is enormous, but is mostly...

/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/../lib/gcc/avr/4.9.2/../../../../avr/bin/ar: dlopen(/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/../libexec/gcc/avr/4.9.2/liblto_plugin.so, 2): Symbol not found: _environ

  • Referenced from: /Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/../libexec/gcc/avr/4.9.2/liblto_plugin.so*
  • Expected in: /usr/lib/libSystem.B.dylib*

then several "abi.cpp.o: plugin needed to handle lto object"

the final lines are
collect2: error: ld returned 1 exit status
exit status 1
Error compiling for board Arduino/Genuino Uno.

How did you add support for your Sparkfun Redboard?