Eric Slivka, MacRumors:

Following Apple’s shift to California-themed names for its Mac operating systems with OS X Mavericks back in 2013, Apple appeared to take steps to protect a number of other California-related names by filing for trademarks under a series of shell companies intended to mask the true identity of the applicant.

And:

All told, we identified 19 trademarks that were applied for under six different companies that all appeared to be Apple shell companies. Several of these names, including Yosemite, Sierra, and Mojave, have been used by Apple, while others have yet to be put to use.

And:

Of the original 19 names that were included in the trademark applications, all but four of them have been either used by Apple or abandoned, with the remaining live applications being Mammoth, Monterey, Rincon, and Skyline.

This is some terrific detective work.

Of the four names, I like Mammoth and Monterey. Mammoth Mountain is a popular ski area (one of my favorite places to ski, back in the day) and Monterey is a city, county, and bay and, most importantly, home to the Monterey Bay Aquarium.

My money’s on Monterey, for purely sentimental reasons. Though I’d throw in a wild card vote for this list of the top 10 tallest California peaks.