Currently Being ModeratedOct 22, 2013 1:02 PM (in response to iMaF.Ash)
Apple claims no. If it is like the upgrade from Lion to Mountain Lion, your data should survive the upgrade. But, as in all cases of upgrades, back up your system first.
Currently Being ModeratedOct 22, 2013 1:04 PM (in response to iMaF.Ash)
My Question is, Will it Wipe all my data in my MacBook Pro if I Upgrade to Mac OS X Mavericks 10.9
No, but is something goes wrong with the installation you will wish you had a backup, so make one before upgrading.