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Installing Scratch 2 Offline on Knoppix

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For those of you who would like to install Scratch 2 for offline editing in a Knoppix environment


  1. Start up Knoppix – I used Knoppix 7.4.2
  2. Choose the ‘Burn to flash disk option’ and select the appropriate USB device which you want to use
  3. Start Knoppix on your PC via booting from USB (use the USB flash drive you created in previous step)
  4. Navigate to the Scratch website and download the components for offline Scratch editing
    1. Download the Adobe runtime
    2. Download the Scratch AIR file
  5. Install the Adobe runtime
    1. See here for more information – Install Adobe runtime
  6. Install the Scratch AIR file
    1. See here for more information – Install Scratch AIR
  7. Run the installer with the absolute path of the Scratch AIR file (only needs to be done once)

In future you can start Scratch…

  1. From the Desktop icon
  2. From the Start menu – in the Accessories folder
  3. From the command line – it is installed in /opt/Scratch 2/bin

Written by Rudi Engelbrecht

September 24, 2015 at 12:54 am

Posted in Uncategorized

Biltong Recipe

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My current biltong recipe… very popular with everyone 😉


  1. Safari Biltong Spice (Crown National) – 100 to 200 grams depending on taste (I prefer around 200 grams per batch)
  2. Apple Cider Vinegar – approx. 100ml
  3. Worcestershire sauce – approx. 30ml 
  4. Meat – Topside cut works best – around 3.5 kg (up to 4kg will also work)
  5. 1 or 2 plastic containers – large enough to marinate the meat.
  6. Biltong dryer

Preparation Steps – (15 minutes)

  1. Buy the meat – ask butcher to cut into fillets / strips – WITH the grain – NB. Also – ensure that the fillets are 20mm thick or more.
  2. Measure the biltong spice in a cup.
  3. Add the Apple Cider Vinegar in another cup.
  4. Add the Worcestershire sauce in the cup with the Apple Cider Vineger.
  5. Place each fillet in the container creating a layer of meat  – sprinkle the vinegar on both sides of the meat, rub in the vinegar, sprinkle the spices on both sides of the meat, rub the spices in.
  6. At this stage I usually have 3 or 4 pieces of fillet in the container.
  7. Do the same to the rest of the meat in the other container.
  8. Put lid on the container(s) and put into refrigerator.

Marinating Steps

  1. Leave the container with the meat in the refrigerator for between 8-24 hours. I leave mine in the refrigerator for approx. 1 day to marinate.

Drying Steps

  1. Remove the container from the refrigerator
  2. Put biltong hook through one end of the meat, try to keep the thickest part of the fillet at the top, where the hook is.
  3. Hang the fillets
  4. Biltong will be ready in 3 to 7 days – depending on how you like it, soft, medium, dry etc.


  1. You can use other cuts of meat – Silverside (not corned), or Rump works as well, but Topside gives the best result.
  2. Apple Cider Vinegar is sweet and and gives it a nice taste in conjunction with the spices.

Useful links

  1. Safari Biltong Spice used above
  2. BiltongBru
  3. BiltongSpice

Please ask questions if anything is unclear.

Written by Rudi Engelbrecht

February 4, 2015 at 8:20 am

Posted in Uncategorized

Installing Mavericks on an unsupported Mac Pro

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For those of you with an older Mac Pro – model MacPro1,1 or MacPro2,1…

I managed to install Mavericks (Mac OS X 10.9.3) on my MacPro2,1. Since support for the MacPro2,1 and earlier models have been dropped in recent releases of Mac OS X, it is not so straight forward to install Mavericks on older hardware.

I read that the graphics card needs to be upgraded as well and the Apple version of the ATI Radeon HD 5770 was a good choice. I ordered one and swopped it with the old card. I was still running Snow Leopard (Mac OS X 10.6.8) and it booted up perfectly.

The steps I followed was to build an installable USB using the process described at the Sixty Four On Thirty Two (SFOTT) website.

Unfortunately it did not work straight away – My Mac Pro did not boot up.

What I proceeded to do then was to do the following:

  1. Find another machine with recent hardware which allows you to install or boot Mavericks – I have a recent MacBook Pro.
  2. Use Disk Utility to partition an external drive to install Mavericks on it since I did not want to install Mavericks on my MacBook Pro.
  3. Boot with the installable USB on my MacBook Pro (the machine which is supported by Mavericks).
  4. Tell the Mavericks Install that I want to install Mavericks on the external drive (NB. I wanted to keep my existing install on the MacBook Pro intact).
  5. Finish the install.

After this I tried to boot the Mac Pro with the external drive which now has a clean Mavericks installation. Unfortunately this still did not work. I looked at the boot.efi file and the PlatformSupport.plist file and these did not contain the necessary changes.

I then copied the boot.efi (the modified version) from here to the external drive. The locations updated were:

  1. System/Library/CoreServices
  2. usr/standalone/i386

I then edited the PlatformSupport.plist file by adding my board-id and my model identifier (MacPro2,1) to the file in the following location:

  1. System/Library/CoreServices

I tried booting from the external drive again and it worked!!!

I then used SuperDuper to clone the external drive (the one with the bootable and modified Mavericks install) to the Mac Pro internal drive and rebooted. My Mac Pro is now up to date and I am a very happy customer 😉

My next step is to investigate upgrading the RAM on the Mac Pro to extend it’s life even more.

Written by Rudi Engelbrecht

June 12, 2014 at 2:02 pm

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VirtualBox and resizing (compacting) the VDI disk

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My installation of Ubuntu 10.04 made use of a dynamic disk. Thus the VDI file on disk kept on growing as I was using it. After a while the VDI disk grew from 38GB to 78GB. I searched around and the easiest option was to use CloneVDI (a Windows program) which clones a VDI file and optionally compacts it as well. I selected the option to keep the UUID the same and simply moved the old file out of the way, dropped the new file (now 38GB in size again) into the same place with the same name of the previous old VDI file and started up the Guest VM.


PS. When installing the AllMyApps version of CloneVDI my instance of AVG Anti-virus kept on saying there is a trojan file, which I allowed it to remove (move into the Vault) – however – there might be other downloads out there which does not force you to go through AllMyApps.

Written by Rudi Engelbrecht

August 29, 2013 at 4:59 am

Posted in Uncategorized

VMware vSphere Client

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For those of you who want to download the VMware vSphere Client without navigating to the VMware website – go to this webpage… Chris Blogspot

Written by Rudi Engelbrecht

August 27, 2013 at 4:06 am

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Recent successes with Drobo FS and Mac OS X

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I purchased a Drobo FS in July 2011 with the intention of using it as a big NAS drive. My first attempts were not that successful.

The throughput speed was extremely slow. About 500KB/s when writing to it. Some posts on the Internet suggested this was due to Mac OS X, AFP and Drobo FS firmware. Over time I managed to find a partial solution by connecting it directly into a Mac (not accessing it via a shared router). Sometimes the speed would be up to 30MB/s when writing.

I decided to investigate this again and stumbled on Jumbo Packets – MTU of 9000. So I configured the Drobo FS with a MTU of 9000 and my Gigabit Ethernet on my Apple Thunderbolt Display with a MTU of 9000. My MacBook Pro is connected to the Apple Thunderbolt Display and this means I get the following speeds:
Writing: 30MB/s to 40MB/s
Reading: Up to 95MB/s

So I am much happier now – My MacBook Pro has access to a big disk and I am busy cleaning out all the backups and duplicate copies of files.

Written by Rudi Engelbrecht

August 23, 2013 at 12:50 am

My Bucket List

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I have been browsing some amazing pictures of Zanzibar last night. So here goes my first version of my Bucket List.

  1. Visit Zanzibar – 2-3 weeks of bliss in sky blue waters
  2. Live a summer in the French country side
  3. Live a summer in Italy – country side
I will update this as I find new things to add or as I complete them.

Written by Rudi Engelbrecht

July 17, 2011 at 8:38 am

Posted in Uncategorized