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Archive for the ‘Apple File System’ Category

Resizing a macOS VM’s APFS boot drive to use all available disk space

October 18, 2017 Leave a comment

A while back, I wrote a post on how to resize the boot drive of an existing virtual machine. However, that guidance only applies to a boot drive that uses HFS+ for its filesystem.

Now that Apple File System (APFS) is available and the default file system on macOS High Sierra, a different procedure must be used in order to resize the APFS-formatted boot drive of an existing virtual machine. For more details, see below the jump.

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Unlocking or decrypting using an institutional recovery key does not work with encrypted APFS boot drives on macOS High Sierra 10.13.0

October 10, 2017 6 comments

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 (PRK) – 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.

Screen Shot 2017 10 10 at 5 24 11 PM

2. Institutional recovery keys (IRK) – 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.

Screen Shot 2017 10 10 at 12 48 16 PM

This recovery key model has continued to be used on Apple File System (APFS), starting with macOS High Sierra 10.13.0, with one important difference:

  • You can encrypt an APFS boot drive using an IRK. 
  • You cannot unlock or decrypt an encrypted APFS boot drive using an IRK.

For more details, see below the jump.

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Using the macOS High Sierra OS installer’s startosinstall tool to avoid APFS conversion

September 26, 2017 4 comments

As part of the upgrade process to macOS High Sierra, Apple has stated that certain drives will be converted from using the HFS+ filesystem to Apple’s new default filesystem, APFS. The conversion criteria is shown below:

Screen shot 2017 09 07 at 5 00 58 pm

For those Mac admins who don’t necessarily want to convert yet, there is a way to configure the macOS High Sierra OS installer to skip the APFS conversion. For more details, please see below the jump.

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APFS preparation and macOS High Sierra

September 9, 2017 5 comments

As part of the pre-release announcements about macOS High Sierra, Apple released the following KBase article:

Apple makes a number of statements about APFS and its effects in this KBase article, but what do they all mean? I’m going to try to clarify while staying on the right side of Apple’s NDA. For more details, see below the jump.

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Session videos now available from Penn State MacAdmins Conference 2017

July 27, 2017 Leave a comment

The good folks at Penn State have begun posting the session videos from the Penn State MacAdmins Conference 2017. The sessions slides and currently-available videos are all accessible from the Penn State MacAdmins’ Resources page at the link below:

http://macadmins.psu.edu/conference/resources/

As all the session videos have been posted to YouTube, I’ve linked my Storing our Digital Lives: Mac filesystems from MFS to APFS session here:

Slides from the “Storing our digital lives: Mac filesystems from MFS to APFS” session at Penn State MacAdmins Conference 2017

July 12, 2017 Leave a comment

For those who wanted a copy of my filesystem talk at the Penn State MacAdmins Conference 2017 conference, here are links to the slides in PDF and Keynote format.

PDF – http://tinyurl.com/psumac2017pdf

Keynote – http://tinyurl.com/psumac2017key

Filesystem session at Penn State MacAdmins 2017

July 3, 2017 Leave a comment

I’ll be speaking at Penn State MacAdmins Conference 2017, which is taking place in State College, PA from July 11th – 14th, 2017. My session will be an overview of Apple’s past and present filesystems, with an introduction to Apple File System (APFS) and a discussion of its current state of development. For those interested, my talk will be on Wednesday, July 12th.

For a description of what I’ll be talking about, please see the Storing our digital lives: Mac filesystems from MFS to APFS session description. You can see the whole list of speakers here on the Speakers page.

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