New answers tagged data
To use cellular data, disable Wi-Fi. This may impact location services.
After searching for some hours I found a program which can recover files. http://www.cgsecurity.org/wiki/PhotoRec You select which hard-drive will try to recover data, the format in which files are saved in that disk,... Also you can select which types of files you want to get. For example .jpg. The program will look for files in the hard-drive which have ...
The Apple installer does not erase the disk unless you tell it to - that involves opening Disk Utility. So your files are fairly likely to still be there in the Users folder, just under your old user name. However, you said "She used the installation CD" - you have old hardware running OS X.6 (Snow Leopard) or earlier? those versions DID have an "erase and ...
I'm afraid no such thing exists in Mac OS X. You could try recovering the information you want using software like TestDisk, although might be difficult to recover if you're using a SSD drive or you did a Secure Erase.
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