Working off the the tutorials by Richard Eng and Torsten Bergmann, followed the instruction:
pi@raspberrypi:~/ $ mkdir pharo; cd $_
Downloaded the file from http://files.pharo.org/vm/pharoS/raspbian/latest.zip, unzipped:
pi@raspberrypi:~/pharo $ unzip latest.zip pi@raspberrypi:~/pharo $ wget -O- get.pharo.org/stable | bash --2018-11-18 21:10:16-- http://get.pharo.org/stable Resolving get.pharo.org (get.pharo.org)... 2001:41d0:301::23, 164.132.235.17 ... pi@raspberrypi:~/pharo $ ./PharoS Pharo.image This interpreter (vers. 6505) cannot read image file (vers. 6521). Press CR to quit...
Based on this discussion, a pre-Spur image is needed - downloaded the lastest 5.0 from https://files.pharo.org/image/50-preSpur/. When starting the error opens:
Information Pharo cannot locate the sources file named /home/pi/pharo/PharoV40.sources. Please check that the file is named properly and is in the same directory as this image. Pharo-50496.image
Downloaded sources.zip from https://files.pharo.org/get-files/50-preSpur/ and was able to start Pharo on my Pi.