le0nardwashingt0n Posted October 18, 2014 Share Posted October 18, 2014 Shortly after updating to Yosemite I realized I can't mount any EFI partitions. I even tried reformatting a USB with GPT to experiment and I can't get that EFI partition to mount either. In diskutility it says that the mounting has failed and to use First Aid, but that doesn't help. Nor does repairing permissions. It's only the EFI partitions on the drives, I am able to mount other partitions. The console reports two entries: mount "blocked by dissenter PID=0 (unknown) status=0x0000c047 log=unknown message=(null)" and "diskarbitrationd[39]: unable to mount /dev/diskXsX (status code 0x00000047)." I'm using the most recent clover bootloader on a GA-Q77M-D2H motherboard. I've not had any problems like this before. Mavericks worked great. I can't get in to the EFI partition to see what's going on with clover. Any help would be really appreciated. I'm pretty stumped here and a tad nervous because if anything does wrong I can't fix anything because I'm totally locked out of any EFI partition. Link to comment Share on other sites More sharing options...
HBP Posted October 18, 2014 Share Posted October 18, 2014 use this tool to mount your EFI partitions. http://www.hackintoshosx.com/files/file/49-clover-configurator/ it has a button on the bottom right to allow easy mounting and works flawlessly in Yosemite. HBP Link to comment Share on other sites More sharing options...
le0nardwashingt0n Posted October 18, 2014 Author Share Posted October 18, 2014 Thanks, but that didn't work. It's very strange. I can't even use a newly formatted usb and access that efi. use this tool to mount your EFI partitions. http://www.hackintoshosx.com/files/file/49-clover-configurator/ it has a button on the bottom right to allow easy mounting and works flawlessly in Yosemite. HBP Link to comment Share on other sites More sharing options...
le0nardwashingt0n Posted October 21, 2014 Author Share Posted October 21, 2014 Nobody else is having this problem? I'm thinking about downgrading or reinstalling. I haven't found anything on this in any forums. Thanks, but that didn't work. It's very strange. I can't even use a newly formatted usb and access that efi. Link to comment Share on other sites More sharing options...
justniell Posted October 21, 2014 Share Posted October 21, 2014 use this tool to mount your EFI partitions. http://www.hackintoshosx.com/files/file/49-clover-configurator/ it has a button on the bottom right to allow easy mounting and works flawlessly in Yosemite. HBP this works for me... it's probably hidden Link to comment Share on other sites More sharing options...
aliab Posted October 21, 2014 Share Posted October 21, 2014 open terminal defaults write com.apple.DiskUtility DUDebugMenuEnabled 1 then launch disk utility and make all partition display in the new debug menu then you probably see your EFI partition became some “disk0s1“ repair it you and will see EFI again but no more clover directory so try to reinstall it ? but it's necessary to do a backup Link to comment Share on other sites More sharing options...
Maniac10 Posted October 21, 2014 Share Posted October 21, 2014 Do you run “Kext Utility” to rebuild the kext cache? It also modifies msdosfs.kext, the responsible for mounting FAT32 partitions making it fail the new integrity check. The solution would be to restore the original kext. Link to comment Share on other sites More sharing options...
le0nardwashingt0n Posted October 21, 2014 Author Share Posted October 21, 2014 Thanks everybody, I couldn't figure it out so I ended up just doing a full reinstall (first with chimera, then back to clover). Mounting the EFI partition worked fine for a little while. But argh, it did it again. I did run kext utility, maybe that's the issue. How do I restore the original version of msdosfs.kext? Do you run “Kext Utility” to rebuild the kext cache? It also modifies msdosfs.kext, the responsible for mounting FAT32 partitions making it fail the new integrity check. The solution would be to restore the original kext. Link to comment Share on other sites More sharing options...
Maniac10 Posted October 21, 2014 Share Posted October 21, 2014 It should have made a backup of the kext before the patch, check in the /S/L/Extensions folder. Link to comment Share on other sites More sharing options...
le0nardwashingt0n Posted October 21, 2014 Author Share Posted October 21, 2014 That was totally the issue! Thanks so much. I just went into the yosemite installer and pulled the one from there. It should have made a backup of the kext before the patch, check in the /S/L/Extensions folder. Link to comment Share on other sites More sharing options...
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