Delete User Configurable nvram In High Sierra (10.13)

A nifty little feature of nvram is the ability to delete all of the firmware variables you’ve created. This can get helpful if you’ve got a bunch of things that you’ve done to a system and want to remove them all. If you run nvkram followed by a -p option you’ll see all of the configured firmware variables:

nvram -p

If you run it with a -d you’ll delete the given variables that you define (e.g. boot-args):

nvram -d boot-args

But, if you run the -c you’ll wipe them all:

nvram -c

Clear nvram In macOS Sierra

OS X has the ability to delete all of the firmware variables you’ve created. This can get helpful if you’ve got a bunch of things that you’ve done to a system and want to remove them all. If you run nvkram followed by a -p option you’ll see all of the configured firmware variables: nvram -p If you run it with a -d you’ll delete the given variables that you define (e.g. boot-args): nvram -d boot-args But, if you run the -c you’ll wipe them all: nvram -c

OS X 10.9 Mavericks Gives nvram A Delete All Option

A nifty little new option in OS X 10.9 Mavericks is the ability to delete all of the firmware variables you’ve created. This can get helpful if you’ve got a bunch of things that you’ve done to a system and want to remove them all. If you run nvkram followed by a -p option you’ll see all of the configured firmware variables: nvram -p If you run it with a -d you’ll delete the given variables that you define (e.g. boot-args): nvram -d boot-args But, if you run the -c you’ll wipe them all: nvram -c Enjoy!

KACE 3.3 & the Mac

Version 3.3 of the KACE 2000 appliance introduces a few enhancements for the Mac OS X operating system. These include the following:
  • International Keyboards are now supported in the KACE NetBoot environment
  • Hardware inventory is now supported
  • Pre-installation tasks now support error handling
  • Post-installation tasks now have ByHost support
Overall, a nice update if you’re invested in the KACE appliances, although the Windows enhancements are far more substantial (understandably), with updates to user profile migration (now hive based), driver harvesting and other features, primarily for the Windows 7 clients in your environments.

New Xserve LOM Firmware Update

There is a new Lights Out Management (LOM) firmware available for the Xserve.  This update requires Mac OS X 10.5.6 and will take about two to three minutes in addition to a quick reboot.  While I cannot look at the files and other items it changes (it’s firmware and doesn’t get picked up by snapshoting tools, I would recommend running it when possible.  For more information, see the Apple KB article on the update.

Updating Firmware on Servers

I’m often asked what I think of upgrading the firmware on servers and storage.  My answer there, if it’s a production box and it isn’t broken then don’t fix it…  What if you’re upgrading the firmware on a RAID or RAID card and the device becomes unresponsive?  There’s usually a reason to upgrade, but if you are not experiencing problems then why risk a potential outage if you do not need to?