Did a surprise C300 shoot yesterday.. (thought my camera but they had their own C300).. after the shoot I tried to just drag and drop the files.. (yes I know, for SxS i have software for copying)
Anyway the files wouldn’t copy,although icon came up on the desk top.. 5D files the same.. a message came up.. some items could not be written or copied..an audio file copied fine.. but neither of the 5D or C300.. wouldn’t copy to ext HDD or desk top

My computer Mac air .. Mavericks OS..

Strangely both did copy to the directors MBP.. without any problem.. only difference being he wasn’t on mavericks .. anyone else had this.. files 1080/25p

Thanks for any info..