* I have a MacBook 2011 model but just upgraded the operating system
* I also have SanDisk Ultra 64 Gig Micro SD XC
* MacBook is reading the memory card but I’m not allowed to save anything on it
* I’ve tried reformatting my memory card but it won’t let me
* I have tried it on a Windows laptop and it let’s me save my work
Any ideas on the problem?
Kind regards, Mark
