HCS Blog

An interesting new feature of Caching Server 5 is the ability to cache personal iCloud data.  There could be a variety of reasons why this may not be desirable in some environments, one of which could be concerns over storage capacity on the caching server.  Here is how to disable that feature using the serveradmin command in Terminal:

sudo serveradmin settings caching:AllowPersonalCaching = no

Change that boolean field to yes to re-enable this feature.

Prevent the Photos app in OS X from launching when plugging in an iOS device.

This sets an OS X flag so not activate ImageCapture,Photos or iPhoto when an iOS device is detected.

1. Launch Terminal from the /Applications/Utilities.

2. Enter the following command:

defaults -currentHost write com.apple.ImageCapture disableHotPlug -bool YES

New in El Capitan is the ability to take screen captures of the setup assistant windows.  This is going to be very helpful when writing tutorials that involve the first boot setup assistant screens.

For each screen that you want to capture, press command > shift >3.  Upon login, all of the screenshots will be on the desktop.  

As a bonus, you can take a screen capture of the login window and it works the same way.  The next user that logs in will have the screen capture on their desktop.

There is a very simple way to create an OS X 10.11 El Capitan installer.
You need the full installer of OS X 10.11 El Capitan and a USB Drive (or something similar)
 
 
OS X 10.11 El Capitan has an executable file createinstallmedia to make a bootable usb.


Command to make an external OS X 10.11 El Capitan installer
This is assumes you have a an external partition named "YOURVOLUMENAMEHERE” (You should probably change your volume name)
Make changed where appropriate

sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/YOURVOLUMENAMEHERE/ --applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app/ --nointeraction

2. Type in your password (Assuming you are an admin)
3. You will see the following:

Erasing Disk: 0%... 10%... 20%...100%...
Copying installer files to disk...
Copy complete.
Making disk bootable...
Copying boot files...
Copy complete.
Done.

System Integrity Protection (SIP)

Apple has implemented a new security feature in 10.11, System Integrity Protection, which prevents even super users from altering the contents of files in key System folders. The flags for restricting the folders is applied at the time of installation and cannot be overridden. SIP is designed to protect System files from malware and viruses. 

Disabling SIP requires booting into the recovery partition to run the Terminal command below.

# csrutil disable

which should confirm with status message:

Successfully disabled System Integrity Protection. Please restart the machine for the changes to take effect.

Reboot back into the El Capitan system partition.  

To re-enable SIP, boot back into the recovery partition and set state to enabled:

# csrutil enable