Security in MacBook Air: OS X?

Question

Information Security

By occupation, one has to have information on the PC, even an accidental "descent" of which is not permissible in principle. That is, such a situation when a person simply takes my laptop, sticks a USB flash drive with bootable Ubuntu into it and merges everything he wants - should not be.
Are there anti-theft solutions for Mac OS X? Moreover, those that do not affect performance (encryption of the screw on a not very old firmware turned the computer into an unusable speed). As an option - encryption of a folder.

Answer 1

File Vault

Answer 2

To hell with TrueCrypt! OS X has its own /dev/random that can be used to create encrypted .dmg containers using Disk Utility:
Press ⎇⌘N to bring up the create container dialog in Disk Utility.

Answer 3

Support, filevault. Well, or for the completely paranoid truecrypt, but I usually only keep individual files in it. www.truecrypt.org