How to make your own bootable OS X 10.9 Mavericks USB Install Drive


OSX-MavericksApple have enhanced this OS with varies features however you can still create a recovery drive.

In previous versions of OS X, you were able to download via App Store and using the Disk Utility you could create a USB Installer. Mavericks is not as straight forward but still achievable.



What you need

  • An 8GB or larger USB flash drive
  • The Latest download of OS X 10.9.x Mavericks Installer from the Mac App Store.
  • Latest version of Diskmaker X app
  • An Admin account for use when creating disk

We won’t be covering the Diskmaker X option as it might be too easy for most OCD folks out there. Instead here’s some terminal action:
With the assumption you have the OS X Mavericks installer in your Applications folder and your USB Driver is formatted as OS X Extended (Journaled) with volume name “Untitled”. Type the following command into Terminal.

sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia –volume /Volumes/Untitled –applicationpath /Applications/Install\ OS\ X\ Mavericks.app –nointeraction

The command will erase the disk and copy the install files over. Go have a cuppa tea, this should take a bit.

Installing Windows 7 64bit – Bootcamp


When you try to boot 64bit Windows 7, or Vista SP1 and later, it requires an EFI firmware that is also 64-bit which the iMac lacks. The “fix” is to modify the ISO and reburn it.


0 – create 3 folders c:\windows64iso c:\windows64exe c:\windows64dvd
1 – download this (http://sergiomcfly.googlepages.com/oscdimg.exe) .exe file and put into c:\windows64exe
2 – put .iso you downloaded from ms (or an .iso you created from your retail windows disc) into c:\windows64iso and unzip it
3 – move .iso file out of c:\windows64iso and trash / delete it (won’t need it anymore)
4 – open a dos prompt in c:\windows64exe and type:

oscdimg -n -m -bc:\windows64iso\boot\etfsboot.com c:\windows64iso c:\windows64dvd\windows64dvd.iso

The windows64dvd.iso is the file you gonna burn onto a new DVD

Feel free to post your comments or questions…

Keyboard Shortcuts for Windows 8




Windows Key + D Show Desktop
Windows Key + C Open Charms Menu
Windows Key + F Charms Menu – Search
Windows Key + H Charms Menu – Share
Windows Key + K Charms Menu – Devices
Windows Key + I Charms Menu – Settings
Windows Key + Q Search For Installed Apps
Windows Key + W Search Settings
Windows Key + Tab Cycle through open Modern UI Apps
Windows Key + Shift + Tab Cycle through open Modern UI Apps in reverse order
Windows Key + . Snaps app to the right (split screen multitasking)
Windows Key + Shift + . Snaps app to the left (split screen multitasking)
Windows Key + , Temporarily view desktop
Alt + F4 Quit Modern UI Apps
Windows Key + E Launch Windows Explorer Window
Windows Key + L Lock PC and go to lock screen
Windows Key + T Cycle through icons on taskbar (press Enter to launch app)
Windows Key + X Show Advanced Windows Settings Menu
Windows Key + E Launch Windows Explorer Window
Windows Key + Page Down Moves Start screen and apps to secondary monitor on the right
Windows Key + M Minimize all Windows
Windows Key + Shift + M Restore all minimized Windows
Windows Key + R Open Run dialog box
Windows Key + Up Arrow Maximize current window
Windows Key + Down Arrow Minimize current window
Windows Key + Left Arrow Maximize current window to left side of the screen
Windows Key + Right Arrow Maximize current window to right side of the screen
Ctrl + Shift + Escape Open Task Manager
Windows Key + Print Screen Takes a Print Screen and saves it to your Pictures folder
Windows Key + Page Up Moves Start screen and apps to secondary monitor on the left
Windows Key + Pause Break Display System Properties
Shift + Delete Permanently delete files without sending it to Recycle Bin
Windows Key + F1 Open Windows Help and Support
Windows Key + V Cycle through notifications
Windows Key + Shift + V Cycle through notifications in reverse order
Windows Key + 0 to 9 Launch/show app pinned to taskbar at indicated number
Windows Key + Shift + 0 to9 Launch new instance of app pinned to taskbar at indicated number
Alt + Enter Display Properties of selected item in File Explorer
Alt + Up Arrow View upper level folder of current folder in File Explorer
Alt + Right Arrow View next folder in File Explorer
Alt + Left Arrow View previous folder in File Explorer
Windows Key + P Choose secondary display modes
Windows Key + U Open Ease of Access Center
Alt + Print Screen Print Screen focused Window only
Windows Key + Spacebar Switch input language and keyboard layout
Windows Key + Shift +Spacebar Switch to previous input language and keyboard layout
Windows Key + Enter Open Narrator
Windows Key + + Zoom in using Magnifier
Windows Key + – Zoom out using Magnifier
Windows Key + Escape Exit Magnifier

Taking Screenshots in Mac OS X


CommandShift4There are several keyboard combinations that can be used to take screenshots in OS X. The SystemUIServer process handles these commands.

Command-Shift-3: Take a screenshot of the screen, and save it as a file on the desktop
Command-Shift-4, then select an area: Take a screenshot of an area and save it as a file on the desktop
Command-Shift-4, then space, then click a window: Take a screenshot of a window and save it as a file on the desktop
Command-Control-Shift-3: Take a screenshot of the screen, and save it to the clipboard
Command-Control-Shift-4, then select an area: Take a screenshot of an area and save it to the clipboard
Command-Control-Shift-4, then space, then click a window: Take a screenshot of a window and save it to the clipboard
In Leopard and later, the following keys can be held down while selecting an area (via Command-Shift-4 or Command-Control-Shift-4):

Space, to lock the size of the selected region and instead move it when the mouse moves
Shift, to resize only one edge of the selected region
Option, to resize the selected region with its center as the anchor point


Different versions of OS X have different formats for screenshots.

Mac OS X 10.2 (Jaguar): jpg
Mac OS X 10.3 (Panther): pdf
Mac OS X 10.4 (Tiger) and later: png
In Mac OS X 10.4 and later, the default screenshot format can be changed, by opening Terminal (located at /Applications/Utilities/Terminal) and typing in:

defaults write com.apple.screencapture type image_formatkillall SystemUIServer

Apple’s TimeMachine – How to create a Network Backup


OS X’s TimeMachine software had native support for network backup until the OS X Leopard 10.5.2 was released. Apple had its own reasons for the decision to remove network backup, but many of us would like to be able to still back up over the network.

How do you do it?

Fortunately there is an option to turn-on network support for TimeMachine by running the following command in terminal:

defaults write com.apple.systempreferences
TMShowUnsupportedNetworkVolumes 1

We can finally see network hardrives in selection for backup places. The problem might seem solved, however this is just the beginning.

If you select a network drive for backup, you will see a very familiar message:

the backup disk image could not be created

TimeMachine only supports Mac OS Extended (Journaled) file system.

The solution is to create a place on the network, which will trick TimeMachine, into thinking that it holds data in Mac OS Extended (Journaled) file system. This trick is accomplished via copying a sparsebundle image (with special name) to a network share. You have to do following steps for to make TimeMachine successfully run a backup.


  1. Enable network hardrive support in TimeMachineMount network shared place for backup data
  2. Create a sparsebundle virtual image
  3. Copy the sparsebundle virtual image to the network shared place
  4. Set up TimeMachine for network backup
  5. Optimisation and other information

1. Enable network hardrive support for the TimeMachine software

Network hardrive support for TimeMachine is turn off by default. For changing this fact we have to type following command to the terminal:
defaults write com.apple.systempreferences
TMShowUnsupportedNetworkVolumes 1

After that, you should see mounted network harddrive in TimeMachine’s locations for backup. If it is not this case, probably a restart is needed.

2. Mount Network shared place for backup data

If you have a shared location for backup data on Linux server, you can map the directory as a drive to Mac in Finder application. You have to do following steps:

Click GO and then “connect to server” in finder menu.

Write following path if your sharing is based on protocol samba (SMB): SMB://<IP_ADDRESS_or_COMPUTER_NAME>/<NAME_of_SHARED_PLACE> (e.g. SMB://

3. Create a sparsebundle virtual image This step is very important, because the TimeMachine doesn’t allow to backup data to a network drive, which has any file system except “Mac OS Extended (Journaled)”. So we have to create a disk image in “Mac OS Extended (Journaled)” format.
We have two ways to do it:

Open disk utility (Disk Utility) and create new virtual disk with following atributes:

Save As: <computer hostname>_<hex mac address of en0 interface>.sparsebundle (e.g. MacJohn_00ef9a048c4f.sparsebundle, if you forget to add .sparsebundle, it will be added automatically)
Volume Name: Backup of <computer hostname> (e.g. Backup of MacJohn)
Volume Size: the max amount of space you’re going to set aside for backups. (The volume size is depends on amounts of backup data. I have chosen 150 GB)
Volume Format: Mac OS Extended (Journaled)
Encryption: None
Partitions: No partition map
Image Format: Sparse bundle disk image
Note: Disk utility automatically mounts the image to system volumes. We won’t need the image mounted, so we can safely unmount it.

The previous step can be done by one command in terminal: hdiutil create -size 150g -fs HFS+J -volname “Backup of MacAlec” MacAlec_00ef9a048c4f.sparsebundle

3. Copy the sparsebundle virtual image to the network shared place
You can copy the sparsebundle image to the network shared place using one of the following steps:

Copy the file to shared place by drag and drop operation in Finder application.
If you prefer to work with the terminal, you can type this instead: cp -r <sparsebundle_image_disc_location>/<computer hostname>_<hex mac address of en0 interface>.sparsebundle /Volumes/<NAME_of_SHARED_PLACE>/(e.g. cp -r /Users/Alec/Documents/MacAlec_00ef9a048c4f.sparsebundle /Volumes/Backup/)

Now we can safely delete the sparsebundle image copy on local computer once we are sure that it has been copied to the shared location.

Set up the TimeMachine for network backup

Open TimeMachine preferences (in SystemPreferences).
Click on Change Disk button for select the network drive for backup. (We have to select the “Backup”in our case.)
The first backup will start in two minutes. TimeMachine supports incremental backup, thus the first backup can take very long time (it is depends on network bandwidth and amount of backup data).

If you want to eject the mapped shared volume (/Volumes/Backup in our case), you have to do it within the two minutes countdown before backup starts or after backup is finished. TimeMachine has its own mechanism for mapping network hardrives, so a backup process isn’t interrupted by your hard drive mounting or unmounting. TimeMachine will automatically mount the virtual sparsebundle image, when the backup starts. You will see Backup of <computer_name> as connected device on your desktop, so you won’t need to manually mount the network hard drive later.

4. Optimisation and other information
in order to avoid long delays in backup process caused by Spotlight indexing, You should set the Spotlight application to not index the mapped network drive. Here’s how to remove spotlight indexing for a hard drive:

Open up the Spotlight software preferences in system preferences window
Move to privacy options and add the network drive by plus symbol
If you’d like to back up a little less often, you can modify the file

com.apple.backupd-auto.plist which is located in /System/Library/LaunhDaemons/ to change backup time interval. Open up the file in text editor and find the section: <key>StartInterval</key> <integer>3600</integer> You should change the number 3600 to the number of seconds of your backup interval.


RAM – DDR3 Speed Ratings


computer-ramThe following are DDR3 Speed Ratings:

Core RAM Clock Speed DDR I/O Speed DDR3 Speed Rating PC Speed Rating
100MHz 400MHz DDR3-800 PC3-6400
133MHz 533MHz DDR3-1066 PC3-8500
166MHz 667MHz DDR3-1333 PC3-10667
200MHz 800MHz DDR3-1600 PC3-12800

RAM – DDR2 Speed Ratings


crucialThe following are common DDR2 Speeds:

Core RAM Clock Speed DDR I/O Speed DDR2 Speed Rating PC Speed Rating
100MHz 200MHz DDR2-400 PC2-3200
133MHz 266MHz DDR2-533 PC2-4200
166MHz 333MHz DDR2-667 PC2-5300
200MHz 400MHz DDR2-800 PC2-6400
250MHz 500MHz DDR2-1000 PC2-8000

RAM – DDR Speed Ratings


The following table contains DDR Speed Ratings

Clock Speed DDR Speed Rating PC Speed Rating
100MHz DDR200 PC1600
133MHz DDR266 PC2100
166MHz DDR333 PC2700
200MHz DDR400 PC3200
217MHz DDR433 PC3500
233MHz DDR466 PC3700
250MHz DDR500 PC4000
275MHz DDR550 PC4400
300MHz DDR600 PC4800

How to check if an Email Address Exists


MailIconA lot of the time you email someone and suddenly there’s a bounce back or System’s Administrator reply’s back saying something along the lines of mail didn’t go through to the following recipients etc…

Example of correctly formatted email address – Still wrong:

joe.blogs@reddit.com (VALID but still does not exist)

The above may occur when the end-user took down the wrong email via Phone or while typing



The check below can be implemented in most programming languages incl PHP, Python etc.

1st Step – Find Mail exchanger of reddit.com

nslookup -q=mx reddit.com
reddit.com      MX preference = 10, mail exchanger = mail.reddit.com

2nd Step – Connect to mail server mail.reddit.com

telnet mail.reddit.com 25
250 mail.reddit.com

mail from: <youremail@gmail.com>
250 2.1.0 Ok

rcpt to: <joe.blogs@reddit.com>
550 5.1.1 <joe.blogs@reddit.com>: Recipient address rejected: User unknown in local recipient table

221 2.0.0 Bye


How to change License key for MS Office 2004 for Mac OS


mac-terminalChanging this can be relatively easy but you’ll need to use Terminal. The File we’re aiming to delete is the OfficePID.

Open up your Applications folder, go to Utilities folder and double-click on Terminal. You’ll want to move into the following directory:

/Applications/Microsoft Office 2004/

In Terminal type the following

cd “/Applications/Microsoft Office 2004/”

Make sure you aren’t running any office application at this point!

go one directory deeper ie. Office and delete the Office PID file.

cd Office

rm OfficePID


Now close off Terminal and open up Word or Excel. You will now(hopefully) be prompted to enter in your license key and credentials

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