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2.2   Installing DropDMG

  1. Drag the DropDMG icon onto the Applications folder.
  2. Double-click the Applications folder to open it.
  3. Double-click the DropDMG icon to launch it.
  4. Eject the DropDMG-3.6.4 icon.
  5. To enable certain DropDMG features, please see the Security & Privacy Access section of the manual.

System Services

The DropDMG commands in the Services menu will become available the next time you log in.

dropdmg Tool

DropDMG includes an optional dropdmg command-line tool. It can be installed as follows:

If you downloaded DropDMG direct from C-Command

Go to the Advanced tab of the Preferences window and click the Install “dropdmg” Tool button. DropDMG will ask for an administrator password, as it needs to copy the dropdmg file to the protected /usr/local/bin or /usr/bin folder.

If you purchased DropDMG from Apple’s Mac App Store

Open the Terminal application. To install the command-line tool, enter these commands:

sudo mkdir -p /usr/local/bin/
sudo ln -s "$F/Versions/A/dropdmg" /usr/local/bin/dropdmg

To install the manual, enter these commands:

sudo mkdir -p /usr/local/share/man/man1/
sudo ln -s "$F/Resources/dropdmg.1" /usr/local/share/man/man1/dropdmg.1

If macOS Won’t Launch the App

When you double-click the application file to launch it, macOS may erroneously report:

The app is unlikely to be damaged because the DropDMG-3.6.4.dmg file opened and mounted without error. The DropDMG application file is signed with a Developer ID certificate and notarized by Apple. If desired, you can manually verify this, which will also check that the app is not damaged. Instead, what seems to be happening is that macOS is getting confused by some metadata that was added to the DropDMG-3.6.4.dmg file when your Web browser downloaded it. Either the metadata is incorrect, or macOS is encountering an error when verifying it (perhaps due to a temporary problem with Apple’s servers).

You can work around the problem by downloading the app in a different way (which avoids the metadata). First, open the Terminal app in the Utilities folder in your Applications folder. Then enter this command (all on line line) and press Return.

cd ~/Downloads/ && curl -LO ''
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