Macintosh – JackenHack

MacBook Netflix Flicker Flashing in Full-screen

December 25, 2018 by Jack Zimmermann 1 Comment

I had an annoying problem on my MacBook Pro Mac OS when watching movies on Netflix using Safari. When in full-screen mode, the display would flash/flicker a couple of times a minute. Well, after digging around, I found a solution for it.

Why Does the screen keep flashing when watching Netflix?

Some MacBook Pro’s have dual graphics cards. Mac OS switches between them depending on what kind of work you are doing, and by switching cards it saves batteries. Unfortunately, the built-in Intel graphics cards are the reason for the flickering and flashing. So we need to turn on the high-performance graphics card when watching Netflix.

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Mac OS Remove Purgeable in High Sierra

March 6, 2018 by Jack Zimmermann 71 Comments

I’ve written an article on how to remove the purgeable portion on a hard disk on Mac OS, but in High Sierra, Apple has changed the file system from HFS+ to APFS. Because of that, my old guide doesn’t work. So here is how to remove the Purgeable part of the disk in Mac OS High Sierra.

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Search System Files in Finder Mac OS

October 8, 2017 by Jack Zimmermann 2 Comments

Finding System Files in Finder

Don’t you hate it when you need to find a .plist settings file or any other file that is in one of the Mac OS system files folders? I do. So here is a little tip on how to do global system files search directly in the Finder.

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Mac OS How To Remove Purgeable on Hard Drive

April 20, 2017 by Jack Zimmermann 84 Comments

Can’t Remove Purgeable Disk Space

Note: If you have Mac OS High Sierra installed, you need this guide instead.

When trying to install Bootcamp on my MacBook Pro, I had to delete a lot of files to get enough space to be able to accommodate for a Bootcamp partition on the drive. But even after removing around 60 GB of storage, Mac OS Sierra could still not make a large enough partition for Windows. When checking with Disk Utility it showed that indeed I had enough space, but there was a part called Purgeable that was impossible to move. No tools from Apple are available to handle this, but here’s how I fixed it.

Screenshot of Disk Utility showing Purgeable part of volume

(not actually my disk, forgot to take a screenshot)

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Python Generators for System Administrators

January 26, 2016 by Jack Zimmermann Leave a Comment

Generator functions and Python. Doing your administrative stuff faster.

Often when I need to monitor something on one of my linux servers, I always gravitate towards these papers. I always forget how to use them, so putting them here is for me as much as it is for you. Go though the PDF presentation about Python Generators for System Administrators. and fiddle around with the example code. I’m pretty sure you can find stuff you need to to and you will be amazed of the speed of the code. It took a while for me to wrap my thick head around it, but the end result is great!