After a while of not playing with my EV3 I wanted to play around with Java 8 a little bit I started to setup my EV3 with leJOS 0.9.1-beta setup.

The first mistake (which I did with older leJOS-releases too) was that I unzipped the with a double click from Finder which created a lejosimage-folder with the contents. This will cause the sd to not boot.

To create a Java 8 JRE for the SD card I followed the awesome instructions on this blog.

Short command summary:

gunzip ejdk-8-fcs-b132-linux-arm-sflt-03_mar_2014.gz
tar xvf ejdk-8-fcs-b132-linux-arm-sflt-03_mar_2014
cd ejdk1.8.0/bin
export JAVA_HOME=/usr
./ --dest ../../ejre-8u1-linux-arm-15_may_2015 --profile compact2 --vm client
cd ../..
tar cvf ejre-8u1-linux-arm-15_may_2015.tar ejre-8u1-linux-arm-15_may_2015
gzip ejre-8u1-linux-arm-15_may_2015.tar

The created tar needs to be copied to the sd card before booting the first time.

To connect to my EV3 I realized that because of a bug on OSX El Capitan HoRNDIS will not work so I switch to bluetooth which works like a charm (paired devices, connected from Mac to EV3) with ssh:

ssh root@

To avoid remembering the IP I added the following snippet to my .ssh/config:

Host ev3
  User root