Can not format my SanDisk Extreme Pro SDXC card using Disk Utility

Hello!
So, I have a problem with my SD cards.
I have an 27" iMac where I can read, write or format my SDXC SanDisk Extreme Pro cards for fun.
As soon as I insert them into my MB Pro, I lose that capability. I can only read them.
The option for format the cards gets greyed out.
I must get them working on my MB Pro since I am leaving in a week with my camera and laptop and absolutely have to be able to format the cards in the laptop, since I own a Blackmagic Pocket Cinema Camera where that is not an option in the camera.
I have OSX 10.9.5 on both computers.
There does not seem to be a problem with other external drives that I own. My Western Digital Passport can be formatted, read and written on my MB Pro.
What do you guys think?
Regards,
Atli

I have found a little workaround for this stupid thing.
If you remove your SD card and then log out of your account. Then in again, insert the card, open disk utility and then everything should be okay!
Worked for me on both SD cards, but I have to do this every time I want to format a SD card.

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hello everyone~ let me try to describe as clear as possible!
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Da unsere SSDs keine beweglichen Komponenten aufweisen, sind sie im Betrieb kühl und leise, selbst wenn sie stark beansprucht werden. Der Akku hält nach dem Aufladen länger durch und Ihr Laptop profitiert von einer bis zu 33 % längeren** Lebensdauer
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