I assume that the following works in 10.8 as well as in previous incarnations of OS X:

Rename mach-kernel by putting a period in front of the name, making it .mach-kernel

Jon

macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365