![]() I am left with having to repeat the exercise with CMD-R to get OSX Lion back on. Subsequent attempts to upgrade from Lion to Sierra ( or anything else ) have failed ( machine 'failed to download.' or similar message ) leaving the machine in a state of limbo. Unfortunately you get OXS 10.7.5 ( OSX Lion ), not Sierra or even El Capitain, but at least you get your machine back ( if not your data ). The machine picks up the new drive with nothing on it, goes straight to Apple gets the utilities, you can then download OSX. I put in a brand new drive ( with the machine connected on a wired connection to the internet ), pressed 'cmd-R' keys with the power button. I was previously on El Capitain when my disk drive failed. I too am trying to upgrade from 10.7.5 ( OSX Lion to Sierra ). I've since gone back to and repeated the 'Reinstall Mac OS X' process dozens of times without success.įailing is bad enough but having to wait several hours for the download to finish before it does is soul destroying. Because of these failures and in desperation I opened 'Disc Utility' and hit every button available, 'verify', 'disc repair' etc, in the hope it would fix things, alas, it didn't. I've repeated that process several times over the last few days and it's failed everytime. After following the instructions and waiting umpteen hours for the process to finish it ultimately ended in failure. I ignored the Time Machine option has I hadn't backed up my files (at least I don't think I did/have) and duly clicked on 'Reinstall Mac OS X'. From that I ended up on 'Mac OS X Utilities' and the four options that come with it. After 2-3 hours the process finished and failed and I was left with a grey screen. ![]() I see a second occurrence of a very similar pattern a bit further in the file: "APPLE SSD TS".I'm not very techie so please bare with me chaps.įirst up I went to the App Store and hit the update button. 0201720 0a79 0000 0000 0000 0000 0000 5400 6d69ĮDIT: I just realised this patch replaces the string "APPLE SSD" with as many null bytes. > md5sum /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/*ħ9f51aaf114f3dd8be5e409f6e3c13df /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorageĮf72c0c2bfb1074bf400d3405efdae10 /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage-backupĦ1 0 0xffffff7f813bb000 0x18000 0x18000 (2.6.0) Ĭontents comparison, does this look correct? > od -x IOAHCIBlockStorage-backup > /tmp/kk1 I think I've applied the correct patch from the list above but I cannot seem to find the indicator for my external Kingston SUV500MS120G (SSDNow family). Run these commands in succession to clear the system caches to enable OS X to pick up the modified driver: sudo kextcache -system-prelinked-kernelĮxactly where am I supposed to see the trim enabled indicator on OS X 10.9.5? Sudo perl -pi -e 's|(^\x00\x4D)|$1\x00\x00\x00\x00\x00\x00\x00\x00\x00$2|sg' /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage Modify the driver (choose only one of the following lines, based on the version): # 10.9.4
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