macosmacos-mojavexcodexcode10
I'm using the final version of Xcode 10 on macOS Mojave beta 11. I downloaded the Additional Tools for Xcode 10 package from Apple's website.
When I try to install the Network Link Conditioner Preference Pane, Settings.app displays this error:
“Network Link Conditioner” preferences is installed with macOS and can’t be replaced.
However, the preference pane is not visible inside Settings.app. I even checked under /Library/PreferencePanes – it's not there.
How can I get around this?
With the Java optional package or Oracle JDK installed, adding one of the following lines to your ~/.bash_profile file will set the environment variable accordingly.
export JAVA_HOME="$(/usr/libexec/java_home -v 1.6)"
or
export JAVA_HOME="$(/usr/libexec/java_home -v 1.7)"
or
export JAVA_HOME="$(/usr/libexec/java_home -v 1.8)"
or simply
export JAVA_HOME="$(/usr/libexec/java_home)"
Note: If you installed openjdk on mac using brew, run sudo ln -sfn /usr/local/opt/openjdk/libexec/openjdk.jdk /Library/Java/JavaVirtualMachines/openjdk.jdk for the above to work
Update: added -v flag based on Jilles van Gurp response.
xcode-select --install worked with version 2333, failed with version 2003. So, try xcode-select --install and if that does not work download as described below.
In early February 2014 xcode-select --install has been reporting that "Can't install the software because it is not currently available from the Software Update server". In late February 2014 the command started only displaying help. The solution is to download directly, see "Separate Download" below.
With Xcode 5.0.1 and Mavericks 10.9 the command line tool is no longer available through Xcode. Instead they must be downloaded from the Apple Developer Tools site: https://developer.apple.com/downloads/index.action. This requires signing in with a developer account.
Or via terminal (from the release docs): The Command Line Developer Tools package can be installed on demand using "xcode-select --install” and the installed tools will be automatically updated using Software Update. OS X 10.9 is required for this feature. For earlier versions, continue to use the in-app download in Xcode.
Running the command in terminal produces the following GUI:
Xcode includes a new "Downloads" preference pane to install optional components such as command line tools, and previous iOS Simulators. To open this pane click the "Xcode" button in the top left of the screen near the Apple logo, then click "Preferences", then click "Downloads".
Xcode 5.0 screenshot:
Xcode 4.x screenshot:
If you do not have Xcode, they are available as a separate download from Apple:
Go to developer.apple.com/downloads/index.action, and sign in with your Apple ID (the download's free). In the pane on the left, search for "command line tools" and choose the package appropriate to your version of OS X. Requires Mac OS X 10.7.3 or later.
Best Answer
I ended up manually copying the
.prefPanefile to:After restarting Settings.app, it finally appeared on the list and worked perfectly.
As Martijn Scheffer stated in this comment, the reason for the pane not appearing in System Preferences is that the installer incorrectly puts the file to
~/Library/PreferencePanesinstead of/Library/PreferencePanes.Download in https://developer.apple.com/download/more/ Additional Tools for Xcode 10.1