Apple Releases OS X 10.11.5 El Capitan With Bug Fixes and Performance Improvements. But it is not still confirm that it can resolve Crashes of MacBook Pro.
Prior to releasing the OS X 10.11.5 update, which has been in testing since April 6, Apple seeded four betas to developers and public beta testers. The OS X 10.11.5 update can be downloaded through the Software Update mechanism in the Mac App Store. It is available to all OS X El Capitan users. 
Apple's update to OS X 10.11.5 will bring numerous Stability, compatibility and security improvements. It is said in references to the software update in Apple's release notes. Apple recommends the update OS X10.11.5 to all users of El Capitan. You can download updates directly through the operating system, however, before updating please make sure to make a backup copy on Time Machine, so that all of your data is secured in case of damage.
Apple old OS X 10.11.x was facing "small" problem with the stability of the operating system in some MacBook Pro. Many MacBook Pro users report that OS X 10.11.x hang their Macbooks . Apparently, the problem occurs only when the operating system version OS X 10.11.4 El Capitan is on, but not in previous versions. Whether the newly announced update provides a solution that is unlikely. Notably MacBook Pro 13 inch Retina display from spring 2015 are also affected by the bug. This operating system is not yet publicly available - not even developers can use it.
For Apple, it should however be already tested internally. OS X 10.11.6 might be the last update before OS X 10:12 will be rolled out, which is expected in the summer in WWDC event.
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