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Check MD5 checksum on MAC

You can check the MD5 checksum of any file on your MAC. Launch the Terminal software on your MAC.

Goto Applications - Utilities - Terminal

Navigate to the folder where the file is locate that u want to check the MD5 checksum. U will be at the default drive. To move into the folder, type cd "Folder Name". In my case, my folder is Downloads so I will type cd Downloads and hit enter.

Checking the MD5 Checksum of file

md5 Android_Revolution_HD-4G_6.1.0.zip

Result will be as shown as extract from Terminal on my MAC

MD5 (Android_Revolution_HD-4G_6.1.0.zip) = 241ef4288d58b4264415a4dbb8cdb14f

You are return the MD5 checksum code which you can check with the MD5 code provide for you by the person who upload the file. This is to ensure that the file u obtain is correct and not corrupted.

Mobile Contacts on Facebook

ALL THE PHONE NUMBERS of your contacts are now on Facebook if u use the Facebook Apps! Go to the top right of the screen, click on ACCOUNT, click on EDIT FRIENDS, left side of screen and click CONTACTS. you will see all phone numbers from your phone (FB friends or not) are published that you have stored in your mobile phone.

TO REMOVE, go to the right column, click on "remove all your imported contacts" please repost this on your Facebook, Twitter and Google Plus status, so your friends can remove their numbers and thus prevent abuse.

Facebook also state that the information is available to you only but it also mention it can be use to made friend suggestion for you and others.