No Audio Units installed on Mac

Hi there, i decided to migrate over to a Mac from windows and ive got an imac running High Sierra. Ive installed cubase on it and got logic pro X, using cubase is fine but non of my VSTi’s have installed an AU component and so cannot be opened in logic. Why is this and is there a work around?

p.s. the VSTi AU patcher doesnt work either

thanks