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Driver conflict 64GB MXF UDF /mac
Eventually found someone with the same problem.. 64GB card not mounting with mac.. please see below
although oddly enough for me the 34GB are fine only the 64 a problem even with brand new computer bought today.. all drivers are installed and upto date..even new driver 1.1..If the cards are inserted after boot they are present as device but getting no mountpoint. one reason is, that the udf driver is not loaded by the system. it seems that the trigger is not going through (no hot-swap) when the card is inserted. the problem is the same with the 32GB cards in this constellation. I then installed the sony udf driver but this one is also not triggered and not loaded. A manual load of the kernel extensions fails. I thought on writing a script that the drivers are forced to load at boot, but thats not the solution. When I boot with the cards inserted and they mount, everything is running normal till I do a new reboot, so it is possible to work.
Interesting thing is that the OS is loading always the Mac OS UDF driver. Never the Sony UDF one.