Here's the step by step way to update:
Repair Permissions using the Disk Utility on the drive to be updated;*
Backup your current installation using Carbon Copy Cloner or SuperDuper;
Use the Software Update to download and install 10.9.2;
Re-boot;
Run MultiBeast for Mavericks and
just select your audio driver to install;
Re-boot; and
Repair Permissions again.
If you have TRIM enabled, check to see if it was affected by this update.
* You can use the Terminal instead of Disk Utility if you feel comfortable with a UNIX command:
Code:
sudo diskutil repairPermissions /