Enable native NTFS Read/Write in Snow Leopard

First, uninstall NTFS-3G/Paragon if installed.
Open Terminal.app (/Applications/Utilities/Terminal)
Type “diskutil info /Volumes/volume_name” and copy the Volume UUID (bunch of numbers).
Backup /etc/fstab if you have it, shouldn’t be there in a default install.
Type “sudo nano /etc/fstab”.
Type in “UUID=paste_the_uuid_here none ntfs rw” or “LABEL=volume_name none ntfs rw” (if you don’t have UUID for the disk).
Repeat for other NTFS partitions.
Save the file (ctrl-x then y) and restart your system.

After reboot, NTFS partitions should natively have read and write support. This works in both 32 and 64-bit kernels. Support is quite good and fast, it even recognizes file attributes such as hidden files.

Alternative Method by iBlacky:
Rename the original /sbin/mount_ntfs tool:

sudo mv /sbin/mount_ntfs /sbin/mount_ntfs.orig

Create a script like this:

#!/bin/sh
/sbin/mount_ntfs.orig -o rw “$@“

save the script to /sbin/mount_ntfs

sudo chown root:wheel /sbin/mount_ntfs
sudo chmod 755 /sbin/mount_ntfs

Enjoy R/W access to NTFS volumes…

In case you don’t like it

sudo mv /sbin/mount_ntfs.orig /sbin/mount_ntfs

and everything is back to R/O.

http://forums.macrumors.com/showthread.php?t=785376

Show all files in the Finder

defaults write com.apple.Finder AppleShowAllFiles YES

defaults write com.apple.Finder AppleShowAllFiles NO

http://www.macworld.com/article/51830/2006/07/showallfinder.html