Folks, I have must installed Yosemite, oh my, it’s the most beautiful OS I have ever seen. Mail works great, I had waited as I heard mail was a problem, but so far it’s good.
However I do have a question. I have a Solid State Drive as the primary on this Mini. I used Trim Enabler to keep it functioning as it should, now when I try to load the App I get the following. I don’t really want to override Apple’s security in order to run Trim Enabler, but what are the opinion’s of those in the know? If I don’t use Trim Enabler what will happen to the drive? Any program that can be run over the drive every so often will will perform the same function without altering the Kernel Extension, such as Tech Tools? Any suggestions will be appreciated, many thanks. John In OS X 10.10 (Yosemite), Apple has introduced a new security requirement called kext signing. (A kext is a kernel extension, or a driver, in Mac OS X) Kext signing basically works by checking if all the drivers in the system are unaltered by a third party, or approved by Apple. If they have been modified, Yosemite will no longer load the driver. This is a means of enforcing security, but also a way for Apple to control what hardware that third party developers can release OS X support for. Since Trim Enabler works by unlocking the Trim driver for 3rd party SSD’s, this security setting prevents Trim Enabler to enable Trim on Yosemite. To continue to use Trim Enabler and continue to get Trim for your third party SSD, you first need to disable the kext signing security setting. It is important to note that the kext-signing setting is global, if you disable it you should be careful to only install system drivers from sources that you trust. Trim Enabler support Trim Enabler 3.3 will disable the kext-signing setting automatically for you, by giving a choice when you flip the switch. By clicking Proceed, your computer will reboot with kext-signing disabled. You can then flip the switch again to enable Trim. When you flip the switch back to Off, Trim Enabler will ask you if you want to restore the kext-signing setting back to normal. Important issues The kext-signing setting is stored in your Mac’s NVRAM/PRAM, a sort of flash memory inside your Mac. This memory can be reset either by accident or by intention (usually by troubleshooting issues with your hardware <http://support.apple.com/kb/PH14222?viewlocale=en_US>), causing kext-signing setting to re-activate. If you try to boot a Trim-enabled system with the kext-signing setting re-activated, you will be met by a gray screen with a stop sign: This is your system telling you that a driver has been modified, and is not allowed to load. To avoid this situation, you can make sure to disable Trim before performing any hardware maintenance or PRAM reset on your Mac.
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