The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Apple’ Category

Viewing a USB WebCam on Windows 10 without any fuzz

Posted by jpluimers on 2020/09/28

Windows 10 comes with a broken Camera viewer and before that, Windows 7 killed the one in Windows XP.

On a Mac you have the open source Quick Camera (which named QCamera before, seeViewing an USB camera on Mac OS X without mirroring and Capturing from a Magewell XI100USB on a Mac using OS X) at [WayBack] GitHub – simonguest/quick-camera.

For Windows 7, a long search initially revealed a lot of bloat-ware, but finally ended to these two both from the same author:

It is not open source (yet?), but since it is .NET, it is reasonable easy to see the innards.

Like QCamera, it does not require installation: just unzip and run. Enjoy!

Yes, I know there are Windows 10 workaround steps via Microsoft.CameraApp.App.ctor, but if you look at [WayBack] Win10 Home N – Camera App fails: System.IO.FileNotFoundException – Microsoft Community you will understand I did not apply them.

Similarly, when you install Skype from the app store, then sign-in, it will tell you that Skype is out of date.



Posted in .NET, Apple, Development, Mac OS X / OS X / MacOS, Power User, Software Development, Windows | Leave a Comment »

Need to figure out how to remount 2015 Retina MacBook Pro SD card that got ejected during sleep

Posted by jpluimers on 2020/09/04

Somehow, every now and then, a 2015 Retina MacBook Pro will eject the SD Card during sleep.

I’m not sure about the cause, just about the message that a drive got unmounted in an unexpected way.

This fails to rescan for the drive on Mac OS Sierra:

sudo kextunload -b
sudo kextload -b

As per [WayBack] external disk – Problem with kextunload SD card remount – Ask Different, I tried the kextstat below, however, before the unload/load statements, kextstat | grep -e SDXC returns nothing.

After them, it returns something like

156 0 0xffffff7f841f3000 0x12000 0x12000 (1.7.6) 0F6F5025-A1C4-3E77-9ECD-4D4410E684C5 <16 15 12 5 4 3 1>

When it happens again, I will likely need to read these:

It might be that somewhere along the line, SDSX is not started by default any more or not applicable to MicroSD to SDXC card converters. These screenshots at least show that this disk is connected via a USB path:

The screenshots are from the stock “System” tool, and I really wish it showed the kext drivers used for each device. That would make debugging these issues a lot easier!

A solution then could be as easy as this:

Unmount all USB connected devices (for instance with a command like diskutil eject disk1);

sudo kextunload -b
sudo kextload -b

However my first try got me an error similar to the one result [WayBack] External USB disk sometimes requires a reboot to be recognized after eject – Ars Technica OpenForum I found after searching for “class com_apple_driver_AppleUSBCardReaderDriverNub has” “instances.”:

7/28/16 10:05:54.000 AM kernel[0]: Can't unload kext; classes have instances:
7/28/16 10:05:54.000 AM kernel[0]: Kext class com_apple_driver_AppleUSBCardReaderDriverNub has 2 instances.


Posted in Apple, Mac, MacBook, MacBook Retina, Power User | Leave a Comment »

Brew reminder to self

Posted by jpluimers on 2020/08/05

From the update process:

==> Caveats
==> hub
Bash completion has been installed to:

zsh completions have been installed to:
==> python
Python has been installed as

Unversioned symlinks `python`, `python-config`, `pip` etc. pointing to
`python3`, `python3-config`, `pip3` etc., respectively, have been installed into

If you need Homebrew's Python 2.7 run
  brew install python@2

You can install Python packages with
  pip3 install 
They will install into the site-package directory

==> youtube-dl
Bash completion has been installed to:

zsh completions have been installed to:
==> mpv
zsh completions have been installed to:
==> node
Bash completion has been installed to:


Posted in Apple, Development, Home brew / homebrew, Power User, Python, Scripting, Software Development | Leave a Comment »

MacOS/OS X/Mac OS X: Keeping an eye on your used disk space

Posted by jpluimers on 2020/07/06

Two tools I like:

GrandPersctive is good at showing a visual overeview. OmniDiskSweeper is better at gradually drilling down.

Easy installation:

brew install caskroom/cask/omnidisksweeper

$ brew install caskroom/cask/grandperspective


Posted in Apple, Mac OS X / OS X / MacOS, Power User | Leave a Comment »

MacOS/OS X/ Mac OS X tip: AppCleaner

Posted by jpluimers on 2020/07/03

[WayBack] AppCleaner helped me get rid of a the gazillion number of versions that GoToMeeting had silently installed and their dependencies.

Gigabytes recovered.

Installing is easy: $ brew install caskroom/cask/appcleaner

AppCleaner is a small application which allows you to thoroughly uninstall unwanted apps.

Installing an application distributes many files throughout your System using space of your Hard Drive unnecessarily.
AppCleaner finds all these small files and safely deletes them.

Simply drop an application onto the AppCleaner window. It will find for the related files and you can delete them by clicking the delete button.


Posted in Apple, Mac OS X / OS X / MacOS, Power User | Leave a Comment »

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