Does OS X have an equivalent to /dev/shm?
You can create and mount a ram based disk as follows:
Create a disk
hdiutil attach -nomount ram://$((2 * 1024 * SIZE_IN_MB))hdiutilwill return the name of the ramdisk.Format and mount the disk
diskutil eraseVolume HFS+ RAMDisk NAME_OF_DISKAccess the disk under
/Volumes/<diskname>cd /Volumes/RAMDisk && touch testfile.txt && ls
Creating a 100MB ramdisk:
$ hdiutil attach -nomount ram://$((2 * 1024 * 100))/dev/disk3$ diskutil eraseVolume HFS+ RAMDisk /dev/disk3Started erase on disk3Unmounting diskErasingInitialized /dev/rdisk3 as a 100 MB case-insensitive HFS Plus volumeMounting diskFinished erase on disk3 RAMDiskOriginal source: http://www.frederico-araujo.com/2008/12/18/blazing-fast-firefox-using-osx-ramdisk/