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Level 2

152 points

Procedure to Mount ejected Memory Flash Cards without reinserting or rebooting

The following Terminal command works to Mount ejected USB flash drives without reinserting or rebooting:

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sudo kextunload /System/Library/Extensions/IOUSBMassStorageClass.kext ; sudo kextload /System/Library/Extensions/IOUSBMassStorageClass.kext

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Source: http://ask.metafilter.com/241301/Mac-Mount-ejected-flash-drive-without-reinserti ng

yet, it does NOT work for Memory Flash Cards like the SanDisk Extreme 128 GB SDXC Class 10 UHS-1 Flash Memory Card 45MB/s SDSDX-128G-X46

http://www.amazon.com/SanDisk-Extreme-Class-Memory-SDSDX-128G-X46/dp/B00720TE1M

How to accomplish that with such Memory Flash Cards in Mac with OS X 10.8.4 (Mountain Lion)?

Is there a procedure that could work with both USB flash drives and also Memory Flash Cards at once?

Thanks.

Posted on Jun 10, 2013 3:41 PM

19 replies

ApMaX Author

Level 2

152 points

Jun 15, 2013 7:39 AM in response to FatMac-MacPro

it is not a single Mac, but many Macs, including desktops and laptops. For instance, the new Mac mini, which has a SDXC card slot

http://www.apple.com/mac-mini/specs.html

As well as the new iMac

http://www.apple.com/imac/specs

But that is irrelevant as said. The question is if it is safe to use the following terminal command as explained above:

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sudo kextunload /System/Library/Extensions/AppleStorageDrivers.kext ; sudo kextload /System/Library/Extensions/AppleStorageDrivers.kext

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If someone knows, I will appreciate the answer.

Thanks.

Barney-15E

Level 10

113,004 points

Jun 15, 2013 7:50 AM in response to ApMaX

There are no other disks attached. Just the internal Mac booting Fusion Drive (made of a booting SSD + rotationg HD). Is then safe to do the Terminal command indicated above?

I don't know. The system wasn't designed to work like that, but may be fine. Kext's can be loaded and unloaded, but I don't know if all safeguards regarding USB disks would be adhered to during the unloading.

If nothing is mounted and you unload the kext, I don't imagine there would be a problem.

You'll likely be the first to find out.

ebertek

Level 1

4 points

Oct 10, 2013 12:55 PM in response to ApMaX

Of course it's safe. 🙂 You can look through the list of currently loaded .kexts at System Information.app > Software > Extensions. The only .kext inside AppleStorageDrivers.kext that was loaded on my MacBook was AppleUSBCardReader.kext.

By the way, this (which I believe you also mentioned some time ago) works flawlessly:

sudo kextunload /System/Library/Extensions/AppleStorageDrivers.kext/Contents/PlugIns/AppleUSBCardReader.kext sudo kextload /System/Library/Extensions/AppleStorageDrivers.kext/Contents/PlugIns/AppleUSBCardReader.kext

Nov 8, 2013 10:11 AM in response to ApMaX

On Mountain Lion with built-in SD readers:

sudo kextunload -b com.apple.driver.AppleSDXC
sudo kextload -b com.apple.driver.AppleSDXC

Procedure to Mount ejected Memory Flash Cards without reinserting or rebooting