[Links to USB driver(SiLabs CP2104 Driver)](https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/drivers/CP210x_VCP_MacOS.zip) for MacOS is too old (v4.x.14 - Nov. 3, 2016). There is [newer version of the driver](https://www.silabs.com/developers/usb-to-uart-bridge-vcp-drivers) (v6.0 - Dec, 18, 2020) on SiLabs site, and it supports macOS Big Sur.
Links to USB driver(SiLabs CP2104 Driver) for MacOS is too old (v4.x.14 - Nov. 3, 2016).
There is newer version of the driver (v6.0 - Dec, 18, 2020) on SiLabs site, and it supports macOS Big Sur.