There’s been a lot of speculation about whether Google would build a Mac version of its new Desktop Search tool. After talking with Google’s product manager Marissa Mayer today, we came away with the distinct impression that it’s way, way, way on the back burner, if it’s even being cooked up at all. The reason is Spotlight, the fast and smart indexing engine that will power desktop searching in the next Apple operating system, dubbed Tiger.

“There’s a lot of compelling work there when you take a look at a Spotlight,” Mayer said. “You have to wonder if Desktop Search would have the same impact on the Mac community as it’s had on the Windows community. As Apple releases stuff before we do, it becomes less of a priority for us.”

This fits in perfectly with Google’s approach to innovation, which is to seek out technology problems and solve them. (eg: Web-based email is broken. Solution: Gmail.) Windows desktop search was a big problem. The Mac. No problem.