When Apple releases OS X Mavericks, a bugfix update is expected shortly thereafter.
Apple's upcoming release of its Mac operating system is due out any day now, bringing with it a number of new features that include some major changes to memory management and process handling that should increase battery life on laptops, and make systems with fixed or limited resources more capable.
After months of development and having issued numerous developer preview releases of Mavericks to its development and testing communities, last Friday Apple issued the Golden Master build of Mavericks, which, unless some major bug is found in these final days of testing, will soon be released to the public through the Mac App Store.
However, this does not mean that the OS is bug-free. Updates can often introduce problems, whether known or unexpected, that then need to be addressed.
Recently, Apple has been issuing internal builds of its next OS X releases, consisting of the next OS X 10.10 project and also maintenance of OS X 10.9. Currently nightly builds of OS X 10.9.1 are being tested at Apple, showing that even before the initial release of Mavericks, Apple is preparing an update to address known problems and implement late features that didn't make it into the initial release.
This is nothing new for Mac OS, which Apple has usually updated quickly, generally within a month after the initial release. Still, if you are planning on upgrading to Mavericks immediately, rather than waiting for the 10.9.1 release, be aware of the possibility of bugs and take precautions. The easiest one is to simply make a full and restorable Time Machine backup of your computer, which you can revert to in case anything goes awry with the update.