Apple has rolled out its third OS X El Capitan beta to public testers ahead of the update’s final release this fall. The rollout comes just a few days after Apple seeded El Capitan beta 5 to registered developers.

This update appears to be identical to that one; it doesn’t introduce any new features or make any major changes, but it is thought to improve performance and fix some pretty significant bugs — which is likely the reason why Apple decided to release it just one week after its second public beta.

Apple typically seeds new betas every fortnight — if not longer — so it’s rare to see them just seven days apart.

El Capitan will be a free upgrade for all compatible Macs this fall. It brings big under-the-hood improvements over OS X Yosemite that should increase performance and stability, including the introduction of Metal for games. It also adds a revamped Mission Control, Split Screen multitasking, and a much-improved Notes app.

If you’re running the El Capitan public beta, you’ll find the third release waiting for your in the Mac App Store.