This list is NOT comprehensive or complete.  Its just the changes I have observed or find interesting.

• Change search locations.  Change the default behavior of Spotlight to have it search the currently selected folder or your most recent search location. Go to Finder -> Preferences -> Advanced -> change “When performing a search:” to “Search the current folder”.
• Spell checker in TextEdit.  Can be controlled in TextEdit preferences.
• Airport menu now shows signal strength of available wireless networks.
• Minimize apps onto their doc icon, instead of the right side of the doc. Go to Apple Menu -> System Preferences -> Dock -> select “Minimize windows into application icon”.
• Activate Expose from the dock:  Click and hold an application icon in the Dock and all the windows for that application will unshuffle so you can quickly change to another one.
• Expose shortcuts:  With all windows visible in Expose, you can press Command-1 to arrange the windows by name or Command-2 to arrange them by application. Pressing the Tab key will cycle through all the running applications. Press the spacebar while pointing at a window to expand it.
• Expose windows are now highlighted with a blue outline when mouse over.
• More reliable disk eject.
• Restore deleted items to original folders.
• Scroll though stacks and navigate folders in stacks.
• Faster shutdown and wake-up.
• HFS+ read support in Boot Camp.
• Screen recording functionality built into Quicktime Player.  Seems to only support the main screen, not external monitors.
• Date in menu bar.d
• Screen saver shuffle.
• Multi-Touch gestures in older Mac models.
• Preview intelligent text selection.
• Location awareness:  Snow Leopard can determine your time zone from information provided by your Wi-Fi hotspot – in your Date & Time preferences, choose Time Zone, and tick Set Time Zone Automatically
• Descriptive Screenshot filenames: Instead of “Picture 1,” you now get “Screen shot 2009-09-04 at 11.26.49 AM”  (It seems they didn’t follow this same goodness with their screencast recordings.  Always hope for their next patch?)

Here is what broke on my upgrade:

• Little Snitch
• iStat Menus

Screen Capture Shortcuts

• Command-Shift-3:  screen capture of your entire screen, save to your desktop
• Command-Shift-4:  crosshair cursor so you can choose which area of the screen you want to capture, save to your desktop
• Adding Control to either of these commands copies the capture into your Clipboard memory, so you can paste it where you want.

via Apple – Pro – Tips – The Secret Screen Capture Shortcut.

I wanted to create a secure drop box to my website and decided to try sshfs.

I had MacFuse already installed from using NTFS-3G.

• Download and install sshfs.
• Double click the gz file you downloaded to extract and rename it to sshfs.
• Move the sshfs application to /usr/local/bin/
  • Go to Finder, Go, Go to folder…
  • type in:  /usr/local/bin/
  • Drag the sshfs app to the folder
  • Finder will ask you to authenticate, so type in your password
• Now you need to change the permissions on the sshfs file so it is executable.
  • Launch Terminal
  • cd /usr/local/bin/
  • ls -al to see files and permissions
  • To change the permissions:  chmod 755 sshfs
  • To change the owner and group:  sudo chown root:wheel sshfs

Now you can use sshfs to mount your remote shares.  I created a script to initiate the mount, but obviously this can be used at the command line. For usage options type:  sshfs -h

Here is my script:

umount /Volumes/Domain.com

rmdir /Volumes/Domain.com

mkdir /Volumes/Domain.com

sshfs [email protected]:path/uploads/ /Volumes/Domain.com/ -o auto_cache -o local -o volname=Domain.com

Here is what happens:

• unmount anything that may exist in /Volume/Domain.com
• delete any Domain.com folder that exists in /Volumes
• create /Volumes/Domain.com to mount the remote file system into
• finally mount the remote file system

Caveat:  sshfs does NOT do file locking, therefor it would NOT be good to use in a multi-user environment.  You can, but you will more than likely run into problems.

Problem:  Hard drives can fill up, and when they do, no good can come of it.  Wouldn’t you like to be notified before impending disaster so you can correct the situation?

Solution:  Here is a simple script that I put in /etc/cron.hourly (would probably be better in cron.daily, but I’m overly paranoid)

#!/bin/sh
# set -x
# Shell script to monitor or watch the disk space
# It will send an email to $ADMIN, if the (free available) percentage of space is >= 90%.
# ————————————————————————-
# Set admin email so that you can get email.
ADMIN=”[email protected]”
# set alert level 90% is default
ALERT=80
# Exclude list of unwanted monitoring, if several partions then use “|” to separate the partitions.
# An example: EXCLUDE_LIST=”/dev/hdd1|/dev/hdc5″
EXCLUDE_LIST=”/boot”
#
#::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#
function main_prog() {
while read output;
do
#echo $output
usep=$(echo $output | awk ‘{ print $1}’ | cut -d’%’ -f1)
partition=$(echo $output | awk ‘{print $2}’)
if [ $usep -ge $ALERT ] ; then
echo “Running out of space \”$partition ($usep%)\” on server $(hostname), $(date)” | \
mail -s “Alert: Almost out of disk space $usep%” $ADMIN
fi
done
}

if [ “$EXCLUDE_LIST” != “” ] ; then
df -H | grep -vE “^Filesystem|tmpfs|cdrom|${EXCLUDE_LIST}” | awk ‘{print $5 ” ” $6}’ | main_prog
else
df -H | grep -vE “^Filesystem|tmpfs|cdrom” | awk ‘{print $5 ” ” $6}’ | main_prog
fi

Download:  diskalert.sh

Credit:  http://www.cyberciti.biz/tips/shell-script-to-watch-the-disk-space.html