[samdisk 4.0 ALPHA] Segmentation fault on macOS writing to SD card about samdisk HOT 1 OPEN

I can't remember if I've tried flash drive access with v4 under macOS, but it certainly shouldn't crash!

It's curious that the v3 works as it shares a lot of the same code in that area. Does sudo samdisk list -v work to show the local disk devices and details? That should perform some simple reading from the start of the disk.

I think I also remember some differences in behaviour between /dev/diskX and /dev/rdiskX. Perhaps also complications if there was a mounted filesystem on the device, from left over filesystem structures on a reused card. Does diskutil list show any mounted partitions on that disk? If so, try using diskutil unmount on the partitions and retry.

from samdisk.