Following up on a pull request by Matthew Kweskin, I’ve updated First Boot Package Install so that it now reports whether an installation has succeeded or failed. This error reporting is in addition to the error logging recorded by OS X’s installer tool to /var/log/install.log.
For those interested, here are the changes to First Boot Package Install‘s firstbootpackageinstall.sh script.
I’ve updated the First Boot Package Install GitHub repo with the new First Boot Package Install installer package, along with updating the posted firstbootpackageinstall.sh script and the Iceberg project files with the changes.
To go along with my use of AutoPkg, I’ve started relying on AutoPkgr to automate running AutoPkg and notifying me when I had new updates. While I was checking over my current list of AutoPkg receipes today, I went to look for a recipe for AutoPkgr. To my surprise, no such recipe appeared to exist.
Thanks in large part to Tim Sutton‘s GitHubReleasesInfoProvider for AutoPkg, I’ve now been able to post download and package recipes for AutoPkgr. The recipes and support files are available from here on my GitHub repo:
Over the weekend, Rasmus Sten posted to Twitter about an interesting uninstall command line utility that he had found while testing 10.10.
On investigation, it became apparent that this uninstall utility was not new and was available starting in 10.7.x and later. It also appears to be undocumented and has neither a man page or help pages available.
To use the uninstall tool:
1. Log into the Mac in question
2. Verify that your application was installed by the App Store
3. Open Terminal
4. Run the following command with root privileges:
5. You will be prompted to authenticate with an administrator’s username and password
6. The application should then be uninstalled.
After working with this tool, it does have some limitations. For more details, see below the jump.
To go along with my earlier post about automating Oracle Java 7 updates, I’ve also posted a script to download and install the latest Java 8 update from Oracle. The method is identical, with the exception of referring to Java 8’s SUFeedURL value in Java 8’s /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Info.plist file.
For more information, see below the jump.
Something I’ve wanted to do for a while was to write a script to download and install the latest Java 7 update from Oracle. I’ve been using AutoPkg to download the latest Java 7 updates using AutoPkg’s OracleJava7 recipes, but I wanted to develop a script that would do the following:
- Download the latest Java 7 installer from Oracle’s website
- Install the latest Java 7 update
- Clean up after itself
Oracle didn’t make this an easy task, as the download URL seems to change on a per-update version. AutoPkg handles its update task by scraping Oracle’s manual download page for the current correct URL to use.
Oracle does provide a Sparkle-based update mechanism for Java 7 on OS X, so I wanted to see if there was a way to leverage that to pull down updates. The only address I could find in that regard was the SUFeedURL value included in Java 7’s /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Info.plist file. I checked that value using the following command:
defaults read "/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Info" SUFeedURL
The output I received for Java 7 Update 67 was the following:
I decided to see what output would come back from Oracle’s site when accessed, so I used the following curl command to see what was returned:
/usr/bin/curl --silent https://javadl-esd-secure.oracle.com/update/mac/au-1.7.0_67.xml
The following XML was returned and I was gratified to see that it contained a download link to a Java 7 Update 67 disk image.
One of the important things I was able to establish is that the XML address embedded with Java 7 Update 67 is not special in this regard. As part of my testing, I verified that using the SUFeedURL value for Java 7 Update 15 and 65 will also work to pull the address of the latest Oracle Java 7 installer disk image.
Using this information, I was able to build a script that can download and install the latest Java 7 update. See below the jump for details.
As part of Apple’s FileVault 2 encryption, Apple has provided for the use of recovery keys. These keys are a backup method to unlock FileVault 2’s encryption in the event that the usual method of logging using a user’s account password is not available.
There are two main types of recovery keys available:
1. Personal recovery keys – These are recovery keys that are automatically generated at the time of encryption. These keys are generated as an alphanumeric string and are unique to the machine being encrypted. In the event that an encrypted Mac is decrypted and then re-encrypted, the existing personal recovery key would be invalidated and a new personal recovery key would be created as part of the encryption process.
2. Institutional recovery keys – These are pre-made recovery keys that can be installed on a system prior to encryption and most often used by a company, school or institution to have one common recovery key that can unlock their managed encrypted systems.
Institutional keys are not automatically created and will need to be properly generated before they can be used. For more information on institutional recovery keys, see below the jump.
While working with a colleague to prepare a FileVault 2 rollout at his institution, he reported that in his testing, the decryption process did not appear to be working correctly when he was booted from the Recovery HD partition and using the command line diskutil-based decryption procedure that I had posted. In his testing, he was finding that the CoreStorage volume that the FileVault 2 encryption process created was not being removed when the diskutil corestorage revert command was run. The drive was being decrypted, but the CoreStorage volume was being left behind. This caused problems in his testing, because he found that rebooting afterwards led to the Mac booting to a prohibited sign.
This symbol at boot means the system has found a bootable installation of Mac OS X on the system, but there is something wrong with it.
After some additional testing, he discovered that he actually needed to run diskutil corestorage revert twice in succession. Running diskutil corestorage revert the first time would decrypt the drive. Running diskutil corestorage revert a second time following the first command would then remove the unencrypted CoreStorage volume. Once the CoreStorage volume was removed, the Mac would then be able to reboot normally to the regular boot drive.
The behavior seems to be tied to the following:
1. Booting from a Mavericks Recovery HD partition (all testing was done with a 10.9.4 Recovery HD partition.)
2. Decrypting either of the following methods:
A. Using Recovery HD‘s Disk Utility to decrypt the FileVault 2-encrypted boot drive. This decryption method is described here.
B. Running diskutil corestorage -revert from the Terminal. This decryption method is described here.
3. Letting the drive get to Conversion Progress: 100% while booted from the Recovery HD partition. Conversion Progress status can be displayed by running the diskutil corestorage list command in Terminal.
4. Rebooting back to the main boot drive once Conversion Progress: has reached 100%.
The end result is a locked CoreStorage volume that will not unlock or mount on boot, or when accessed from a Recovery HD partition or Apple’s Internet Recovery. This was the root cause for the prohibited symbol at boot that my colleague was receiving.
In my testing, I did find it was possible to decrypt the drive via Disk Utility or the command line when it was attached as an external drive (via Target Disk Mode or other means) to a Mac that was booted to a full version of OS X 10.9.x. Once decrypted, I verified that the CoreStorage volume was removed. Once I had verified that, I further verified that I could now boot normally from the previously non-bootable hard drive.
One drawback to decrypting while attached to a regular 10.9.x boot drive is that you are not able to use an Institutional Recovery Key (IRK). Using that kind of recovery key for unlocking or decryption only works when booted from a Recovery HD partition or Internet Recovery. Since that’s precisely where our problem exists, I investigated further to see if there were alternate workarounds for this problem. For more details and the workarounds I found, see below the jump.