Ubuntu 18.04.4 on older Apple hardware

[Ken Cunningham]

happy to report that the deal-breaker problem with the trackpad, 
extremely frustrating, can be solved by installing a different trackpad 
driver. Although I am aware that ubuntu on MacOS hardware is not the 
primary focus of this list, I will record the useful command for 
posterity and for those following. On this MacBook 2,1, this was the 
working command:

sudo apt install xserver-xorg-input-synaptics-hwe-18.04

other versions of this command, for example:

sudo apt install xserver-xorg-input-synaptics

were not correct for this on this machine, at least.

K