GUIDE: SSD Tweaking Guide

sudo tmutil disablelocal

sudo tmutil enablelocal

sudo pmset -a hibernatemode 0

sudo rm /Private/var/vm/sleepimage

sudo touch /Private/var/vm/sleepimage

sudo chflags uchg /Private/var/vm/sleepimage

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN"
        "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
    <dict>
        <key>Label</key>
        <string>com.nullvision.noatime</string>
        <key>ProgramArguments</key>
        <array>
            <string>mount</string>
            <string>-vuwo</string>
            <string>noatime</string>
            <string>/</string>
        </array>
        <key>RunAtLoad</key>
        <true/>
    </dict>
</plist>

sudo chown root:wheel /Library/LaunchDaemons/com.nullvision.noatime.plist

mount | grep " / "

/dev/disk0s2 on / (hfs, local, journaled, noatime)

sudo ditto /Users /Volumes/your_hdd_name/Users
sudo mv /Users /Users.bak
sudo ln -s /Volumes/your_hdd_name/Users /Users

sudo rm -rf /Users.bak

#!/bin/bash

# +----------------------------------------------------------------------+
# | |
# | Set up Mac OS X to store temporary files in RAM rather than on disk.|
# | |
# | By Philipp Klaus <http://blog.philippklaus.de> |
# | |
# | Originally by Ricardo Gameiro <http://blogs.nullvision.com/?p=357> |
# | Changes by Daniel Jenkins |
# | <http://blogs.nullvision.com/?p=357#comment-1140> |
# | |
# +----------------------------------------------------------------------+

cd /System/Library/StartupItems
sudo mkdir RamFS
sudo chown -R root:wheel RamFS
sudo chmod -R u+rwX,g+rX,o+rX RamFS
cat << "EOF" | sudo tee RamFS/RamFS > /dev/null
#!/bin/sh
# Create a RAM disk with same perms as mountpoint

RAMDisk() {
    mntpt=$1
    rdsize=$(($2*1024*1024/512))
    echo "Creating RamFS for $mntpt"
    # Create the RAM disk.
    dev=`hdik -drivekey system-image=yes -nomount ram://$rdsize`
    # Successfull creation...
    if [ $? -eq 0 ] ; then
        # Create HFS on the RAM volume.
        newfs_hfs $dev
        # Store permissions from old mount point.
        eval `/usr/bin/stat -s $mntpt`
        # Mount the RAM disk to the target mount point.
        mount -t hfs -o union -o nobrowse $dev $mntpt
        # Restore permissions like they were on old volume.
        chown $st_uid:$st_gid $mntpt
        chmod $st_mode $mntpt
    fi
}

# Test for arguments.
if [ -z $1 ]; then
echo "Usage: $0 [start|stop|restart] "
    exit 1
fi

# Source the common setup functions for startup scripts
test -r /etc/rc.common || exit 1
. /etc/rc.common

StartService () {
    ConsoleMessage "Starting RamFS disks..."
    RAMDisk /private/tmp 256
    RAMDisk /var/run 64
    #RAMDisk /var/db 1024
    #mkdir -m 1777 /var/db/mds
}
StopService () {
    ConsoleMessage "Stopping RamFS disks, nothing will be done here..."
    # diskutil unmount /private/tmp /private/var/run
    # diskutil unmount /private/var/run
}

RestartService () {
    ConsoleMessage "Restarting RamFS disks, nothing will be done here..."
}

RunService "$1"
EOF
sudo chmod u+x,g+x,o+x RamFS/RamFS


cat << EOF | sudo tee RamFS/StartupParameters.plist > /dev/null
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist SYSTEM "file://localhost/System/Library/DTDs/PropertyList.dtd">
<plist version="0.9">
<dict>
<key>Description</key>
<string>RamFS Disks Manager</string>
<key>OrderPreference</key>
<string>Early</string>
<key>Provides</key>
<array>
<string>RamFS</string>
</array>
<key>Uses</key>
<array>
<string>Disks</string>
</array>
</dict>
</plist>
EOF

chmod 755 ~/MoveTempFoldersToRamDisk.sh
~/MoveTempFoldersToRamDisk.sh

sudo rm -rf /System/Library/StartupItems/RamFS

sudo ditto /private/tmp /Volumes/your_hdd_name/private/tmp
sudo rm -rf /private/tmp
sudo ln -s /Volumes/your_hdd_name/private/tmp /private/tmp

sudo pmset -a sms 0