Welcome to Bike Forums. We have a forum for people with various disabilities. I hope your Mac can follow links. Here it is.
Adaptive Cycling: Handcycles, Amputee Adaptation, Visual Impairment, and Other Needs - Bike Forums
Good luck in your search for a riding partner.
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The Lord is merciful and gracious, slow to anger and abounding in steadfast love. - Psalm 103:8
I am a cyclist. I am not the fastest or the fittest. But I will get to where I'm going with a smile on my face.