High Sierra broke compatibility with some USB devices; I wouldn't be shocked if that was impacted - though I haven't heard complaints about USBTinyISP not working on high sierra, which I would think would generate more complaints than that.
High Sierra broke compatibility with some USB devices; I wouldn't be shocked if that was impacted - though I haven't heard complaints about USBTinyISP not working on high sierra, which I would think would generate more complaints than that.