I have an SSD installed in my MacBook Pro, and have successfully implemented a tweak that disables noatime on the boot drive:
This isn't where I originally found this hint, but that site has gone down. Nevertheless, it's more-or-less identical.
I've decided I'd like to implement FileVault 2 Full-Disk Encryption (FDE) on this SSD, but I don't want to lose the benefits of the "noatime" tweak. Regarding FileVault 2: it transpires there are several ways to implement FDE. The method I'm going to use involves backing up the contents of the drive, then re-formatting the SSD with Encrypted HFS, before copying the contents of the drive back again. According to the Apple documentation, this should cause the EFI to prompt for the Encrypted HFS password on boot, before proceeding to boot as normal to the Login screen. The benefit of this method is that you don't have to log-in automatically to a user account, which is unavoidable using the standard FileVault 2 method.
So, what I'd like to know is: will the LaunchDaemon method for enabling "noatime" on the boot drive work with the FileVault encryption I intend to implement? If not, does anyone know how it could be implemented?
A side question would be: has anyone here attempted the FDE method I describe? I don't have the link to the official Apple documentation where that method is outlined to hand, but I could supply it if requested, I suppose.