I installed the trial of ExtFS 9.7.109 on OS X 10.10.3. It worked great for the first 3 days. But now my ext4 drives no longer show up. Last thing that worked was copying data from a ext4 drive. Strangely, folders moved in Finder were not complete. The ext4 drive showed files not moved. I tried a few times again and eventually it was fine. But on the next reboot the two ext4 drives disappeared. I do not suspect the drives as Diskutil can still see them. Also, installing OSXFuse also works fine. I can copy data that way. But no write of course. I tried reinstalling ExtFS several times but nothing works. I looked in the console but saw no errors from ExtFS. How do you suggest going about debugging this?