Create a RAM Disk in Mac OS X 10.5, 10.6 or above
It is a command to create a 550MB RAM disk, enter it after opening terminal
diskutil erasevolume HFS+ "ramdisk" `hdiutil attach -nomount ram://1165430`
Create a RAM Disk in Max OS X 10.4 or below
$ hdid -nomount ram://52428800
$ newfs_hfs /dev/disk1
$ mkdir /tmp/ramdisk1
$ mount -t hfs /dev/disk1 /tmp/ramdisk1
to ditch the RAM disk and unmount it, just type
$ hdiutil detach /dev/disk1
Here are some apps to create RAM disk
Free:
Esperance DV
Paid:
Ram Disk Utility Pro
