Apple has now released the update to OS X El Capitan version 10.11.4. Among the fixes which it reports are:

• an issue which prevented loading Twitter t.co shortened links in Safari,
• prevents JavaScript dialogs from blocking access to other webpages in Safari,
• an issue which prevented the VIPs mailbox from working with Gmail accounts,
• disconnection of USB audio devices,
• problems with Apple USB-C Multiport Adaptors.

Security fixes include:

• Safari is updated to 9.1, fixing vulnerabilities in libxml2, a spoofing attack, input validation, cookie storage, multiple issues in WebKit, and more,
• apache_mod_php libpng is updated to 1.6.20,
• Bluetooth,
• .dfont handling in Carbon,
• code-signing in dyld,
• Intel and NVIDIA graphics drivers,
• seven different kernel vulnerabilities,
• JavaScript processing and a crypto issue in Messages,
• OpenSSH roaming was turned on by default; it is now disabled,
• LibreSSL is updated to 2.1.8,
• OpenSSL is updated to 0.9.8zh,
• QuickTime fixes,
• Ruby is updated to 2.0.0-p648.

Those appropriate to Yosemite 10.10.5 and Mavericks 10.9.5 are also included in Security Update 2016-002 for them.

There are also extensive updates in iOS 9.3, tvOS 9.2, watchOS 2.2, and Xcode 7.3 – all released at the same time just to keep you busy for a day or two.