This article applies to Code42 for Enterprise version 4.
After upgrading to or reinstalling Mac OS X 10.6, CrashPlan installation fails with a message saying: The installer encountered an error that caused the installation to fail.
- CrashPlan app
- Mac computers that have upgraded to or reinstalled Mac OS X 10.6
- Open Terminal (Applications > Utilities > Terminal).
- Copy and paste the text below into Terminal to change file permissions on the old CrashPlan app:
sudo chflags noschg /Previous\ System/Applications/CrashPlan.app
- Press Enter.
- Type your computer's password and press Enter.
The letters do not display as you type.
- Open Finder and press Command-Shift-G.
/Previous System/Applications/into the dialog box.
- Click Go.
- Move the CrashPlan.app to the Trash.
- Uninstall and reinstall the CrashPlan app.
Under the hood
During installation of Mac OS X 10.6, the existing system is moved to a folder called Previous System and the new operating system is installed. Toward the end of the installation, Mac OS X copies the information from the Previous System folder to the new operating system.
Because the CrashPlan app is "locked" -- a system-level feature that prevents the app from being moved -- CrashPlan stays in this Previous System folder and the uninstaller can fail to remove this copy of the application.