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Apple released a new El Capitan build making it build 15A204h to developers. No major word on what the new build brings, but here is the run down on the notes and known issues so far with El Capitan latest build: (Again, PLEASE make sure you backup your machine(s) before pushing out this update(s))
Installation
Note
- After upgrading to OS X El Capitan Developer Beta, applications that write to protected/system locations may no longer function correctly.
Known Issues
- Directly upgrading from OS X Lion or earlier to OS X El Capitan Developer Beta is not recommended.
- Migration from Windows is not supported in Developer Beta 2.
- Selecting the ‘Do It Later’ option will not install updates for Standard user Accounts.
Aperture
Known Issue
- Aperture may quit unexpectedly when attempting to print photos. The Photos app can be used to print instead.
- RAW images may appear desaturated when scaled in the viewer. Images viewed at 100% will appear with the correct saturation.
Disk Utility
Note
- System file permissions are automatically protected, and updated during Software Updates. The Repair Permissions function is no longer necessary.
Known Issue
- RAID setup assistant is not available in Developer Beta 2.
Garbage Collection
Note
- OS X El Capitan is the last major release of OS X that will support the previously deprecated garbage collection runtime. Applications or features that depend upon garbage collection may not function properly or will not launch when the run-time is removed. Developers should use Automatic Reference Counting (ARC) or manual retain/release for memory management. Xcode includes tools to aid in this migration.
iCloud Keychain
Known Issue
- You may not be able to enable iCloud Keychain using your iCloud Security Code. Approve from another device to resolve this issue.
iPhoto
Known Issues
- Sending emails from iPhoto may not work work correctly.
- Exiting Edit mode may cause iPhoto to quit unexpectedly.
- Location dropdown menus in the Places view may not work correctly.
- Faces may not be detected in newly-imported photos.
- RAW images may appear desaturated when scaled in the viewer. Images viewed at 100% will appear with the correct saturation.
iTunes
Known Issues
- Local Contacts & Calendars may not sync via iTunes.
- Some iPod models may not be visible in iTunes or Finder when connected.
- Devices running iOS 9 Beta may not connect to iTunes on OS X El Capitan Developer Beta 2. To resolve install Xcode 7 beta.
Java
Note
- OS X El Capitan is the last major release of OS X that will support the previously deprecated Java 6 runtime and tools provided by Apple. Applications or features that depend upon Java 6 may not function properly or will not launch when Java 6 is removed. Developers should move to a newer version of Java as provided by Oracle. For more info on Java from Oracle: http://www.oracle.com/technetwork/java/javase/overview/
Known Issues
- Mail may take a longer than expected time on initial launch after upgrading.
- Time Machine cannot selectively restore deleted messages in Mail in OS X El Capitan Developer Beta 2.
Networking
Note
- When negotiating a TLS/SSL connection with Diffie-Hellman key exchange, OS X El Capitan requires a 1024-bit group or larger. OS X El Capitan will not connect to a server that allows negotiation with a 512-bit or smaller group. These connections include:
- Secure Web (HTTPS)
- Enterprise Wi-Fi (802.1X)
- Secure e-mail (IMAP, POP, SMTP)
- Printing servers (IPPS)
Known Issue
- After updating to OS X El Capitan Developer Beta 2, settings in the System Preferences Network Sharing panel may be changed. (rdar://problem/21444124)
Photos
Note
- Photos libraries are not backwards compatible. Once a library has been opened in the OS X El Capitan Developer Beta, it will no longer be openable in OS X Yosemite or earlier.
Known Issues
- Photos may quit unexpectedly after editing a person’s name in Faces.
- Images which have been adjusted may hang on upload to iCloud Photo Library.
Printing
Known Issues
- app may fail to print to a printer or save to a PDF. Export to PDF can be used as a workaround.
- You may be unable to add a new printer via the ‘+’ button in System Preferences. Directly plug in the printer, or find a nearby printer via Bonjour to resolve this.
USB
Known Issues
- USB storage devices, including internal SD card readers, may become unavailable after system sleep and require either re-plug or restart to recover.
- USB 1.0, 1.1 and older 2.0 devices may not function.
Wi-Fi
Known Issue
- AirDrop & AirPlay may not work after wake from sleep. Turn Wi-Fi off and back on to resolve.
- Wi-Fi may be slow if the system sleeps while an AirDrop panel is open. To workaround, reboot the system.
Language
Known Issues
- Some text may not be localized to the selected system language.
- Some languages may have clipped or misaligned layout.