Delete Dmg Files After Installation

Jun 27, 2015  If you don't need them, you can delete installer files. If you plan on reinstalling OS X from scratch (or should you need to uninstall and reinstall a specific application), having installers in a folder on an external hard drive can come in handy and save you time, as you don't have to download them again. Learn how to delete files that are installed during a failed installation, or that are left behind when an application is removed. Files from a failed or removed installation take up disk space and can cause problems when you install or run a newer version of the Adobe application.

This topic includes the following sections:

System Requirements for Installing the JDK on macOS

The following are the system requirements for installing the JDK on macOS:

  • Any Intel-based computer running macOS.

  • Administrator privileges.

    You cannot install Java for a single user. Installing the JDK on macOS is performed on a systemwide basis for all users. Administrator privileges are required to install the JDK on macOS.

Determining the Default JDK Version on macOS

When starting a Java application through the command line, the system uses the default JDK.

There can be multiple JDKs installed on the macOS system.

You can determine which version of the JDK is the default by entering java -version in a Terminal window. If the installed version is 13 Interim 0, Update 0, and Patch 0, then you see a string that includes the text 13. For example:

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To run a different version of Java, either specify the full path, or use the java_home tool. For example:

$ /usr/libexec/java_home -v 13 --exec javac -version

Installing the JDK on macOS

  1. Download the JDK .dmg file, jdk-13.interim.update.patch_osx-x64_bin.dmg.

    Before the file can be downloaded, you must accept the license agreement.

  2. From either the browser Downloads window or from the file browser, double-click the .dmg file to start it.
    A Finder window appears that contains an icon of an open box and the name of the .pkg file.
  3. Double-click the JDK 13.pkg icon to start the installation application.
    The installation application displays the Introduction window.
  4. Click Continue.
  5. Click Install.
    A window appears that displays the message: Installer is trying to install new software. Enter your password to allow this.
  6. Enter the Administrator user name and password and click Install Software.
    The software is installed and a confirmation window is displayed.
After the software is installed, you can delete the .dmg file if you want to save disk space.
Delete dmg files after installation free

Uninstalling the JDK on macOS

You must have Administrator privileges.

Note:

Do not attempt to uninstall Java by removing the Java tools from /usr/bin. This directory is part of the system software and any changes will be reset by Apple the next time that you perform an update of the OS.

  1. Go to /Library/Java/JavaVirtualMachines.
  2. Remove the directory whose name matches the following format by executing the rm command as a root user or by using the sudo tool:
    /Library/Java/JavaVirtualMachines/jdk-13.interim.update.patch.jdk

    For example, to uninstall 13 Interim 0 Update 0 Patch 0:

    $ rm -rf jdk-13.jdk

What Is A Dmg File Type

Installation FAQ on macOS Platform

This topic provides answers for the following frequently asked questions about installing JDK on macOS computers.

1. How do I find out which version of Java is the system default?

When you run a Java application from the command line, it uses the default JDK. If you do not develop Java applications, then you do not need to worry about this. See Determining the Default JDK Version on macOS.

2. How do I uninstall Java?

See Uninstalling the JDK on macOS.

3. After installing Java for macOS 2012-006, can I continue to use Apple's Java 6 alongside the macOS JDK for Java 13?

If you want to continue to develop with Java 6 using command-line, then you can modify the startup script for your favorite command environment. For bash, use this:

$ export JAVA_HOME=`/usr/libexec/java_home -v 13`

Some applications use /usr/bin/java to call Java. After installing Java for macOS 2012-006, /usr/bin/java will find the newest JDK installed, and will use that for all of the Java-related command-line tools in /usr/bin. You may need to modify those applications to find Java 6, or contact the developer for a newer version of the application.

4. What happened to the Java Preferences app in Application Utilities?

The Java Preferences app was part of the Apple Java installation and is not used by Oracle Java. Therefore, macOS releases from Apple that do not include Apple Java will not include Java Preferences.

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This chapter is from the book
Mac OS X Help Line, Tiger Edition

This chapter is from the book

This chapter is from the book

Chances are, you were using Mac OS X even before you bought this book, since few Macs sold in the past few years can boot into anything else. And even if you own an older Mac, the fact that you're reading this volume means you've probably already installed Mac OS X on it!

For that reason, I provided an overview of Mac OS X (in Chapter 2) before this description of how to install the operating system, believing that most of you are already up and running in Mac OS X. Even if that's the case, though, you may someday be called upon to install Mac OS X on an older Mac that's still running Mac OS 9. Or, even more important, you may need to re-install Mac OS X (to fix problems). Finally, as new versions of Mac OS X are released, you will need to upgrade your OS. For all of these occasions, this chapter explains what needs to be done (and why) and offers solutions to a variety of potential problems.

I start off by providing background information on installing Mac OS X for the first time, moving on to give more general information about installing, reinstalling, and restoring Mac OS X software. You'll also learn about upgrading Mac OS X and find recommendations about how best to back up Mac OS X.

In This Chapter

What You Need to Install and Run Mac OS X • 125

  • Which Mac models can run Mac OS X?
  • How much memory do you need?
  • How much hard-drive space do you need?
  • Will you be installing Mac OS 9?
  • Other requirements

Installing or Reinstalling Mac OS X • 128

  • The Mac OS X Install disc(s)
  • Startup from the Mac OS X Install disc
  • The Installer menu
  • The File menu
  • The Utilities menu
  • The Window menu
  • Introduction
  • License
  • Select a Destination
  • Installation Type, Install, and Finish Up

Restoring Mac OS Software • 148

What About Mac OS 9? • 149

  • Getting Mac OS 9 onto your Mac OS X Mac

Selectively Installing Mac OS X Files • 151

  • Do a Custom Install/Restore
  • Copying from the Mac OS X Install discs
  • Reinstalling from a Web download
  • Extracting from an expanded .pax.gz file
  • Use Pacifist
  • Cautions regarding extracting files from update packages

Upgrading Mac OS X • 155

  • Before you upgrade

Can Delete Dmg Files After Installation

Updating Mac OS X • 158

  • Updating from Software Update
  • Updating from the Installer package (.pkg) file
  • Skip the restart?

Downgrading and Re-upgrading Mac OS X • 166

Use: Teaches you how to permanently enchant a weapon to do 5 additional damage. Enchant Weapon - Superior Striking. Tools: Runed Arcanite Rod. Reagents: Large Brilliant Shard (2), Greater Eternal Essence (10) Permanently enchant a Melee Weapon to do 5 additional points of damage. Weapon dmg enchant classic db.

  • Archive and Install, then re-upgrade

Uninstalling Mac OS X • 168

  • Manual uninstall?
  • Using DesInstaller?

Can We Delete Dmg Files After Installation

Understanding Image, Installer Package, and Receipt Files • 169

  • Image (.dmg) files
  • Image files vs. compressed files
  • Installer package (.pkg) files
  • Receipt files

Backing Up and Restoring Mac OS X Volumes • 181

  • Backing up Mac OS X: Utilities for volume backups
  • Backing up Mac OS X: Hardware strategies

Creating an Emergency Startup Volume • 197

  • Bootable hard drive
  • Bootable CD or DVD

Troubleshooting Tips and Hints: Installing Software • 203

  • Can't start up from Mac OS X Install CD
  • Cannot launch Installer successfully
  • Cannot select a volume to install
  • Java Update 1.4.2 will not install
  • Software Update does not list or install an update
  • Software Update quits unexpectedly
  • Installed Updates does not list previously installed updates
  • Install and Keep Package option doesn't keep
  • Installation is interrupted
  • Software installs but fails to work
  • Third-party software will not install
  • Can't install a Classic application
  • Video issues warning
  • A collection of basic tips

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