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AppleScript to change Sound preferences Apps
This hint updates this hint which provides an AppleScript that changes the sound input or sound output device selection.

I use Control Plane to manage various preference differences among the different locations (work, home, travel) where I use my MacBook. Control Plane uses various criteria (e.g., IP address, WiFi network name, etc.) to determine your location. Control Plane offers a lot of built in capability to change settings on your Mac based on arriving or leaving a location, and I recommend it highly if you regularly move your Mac among different working environments.

One capability that is not available in Control Plane is the ability to change Sound preferences when you move your Mac from one place to another. In my case, I have a Thunderbolt Display at work, which has built-in speakers and a built-in microphone. At home, I use my MacBook without a second display. I wanted to be able to change the Sound preferences back and forth using Control Plane.

Control Plane does offer the capability, however, to run any application when it detects that have arrived at or have left a particular location. So, you can run any AppleScript.

Relying on the hint comments here, I have updated the scripts in that hint to address my desire for changing sound preferences. My updated script should work on Lion and Mountain Lion. I cannot say whether it will work on earlier versions of OS X.

tell application "System Preferences" to activate
tell application "System Preferences"
	reveal anchor "input" of pane id ""
end tell
tell application "System Events" to tell process "System Preferences"
	tell table 1 of scroll area 1 of tab group 1 of window 1
		select (row 1 where value of text field 1 is "Internal microphone")
	end tell
end tell
quit application "System Preferences"

Note that this script hard codes the name of the Sound preferences pane tab to select and the sound input device to select. To set an output device, you would change "input" to "output" in the 3rd line of the script and then change the device name in the 7th line. I created separate scripts for sound input and sound output for each location where I work. I then simply created a Control Plane rule for each location for sound input and sound output separately.

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Add info after phone numbers in Contacts Apps
Placing a comma after a phone number in Contacts allows you to add useful information. Without the comma, any information after the number will prevent it from auto-dialing on the iPhone, not recognizing it as a phone number.

Before smart phones I often found it useful to add additional information after a phone number in a contacts database, such as an extension number (x123), person's name or initial (John or J), function (billing), etc. The template in Contacts does not have a field for Extension which would allow for this. In addition, with the iPhone, the number itself will not even assume the proper format (area code in brackets, 3 numbers, dash, 4 numbers) if there is any additional information after the number, and therefore you won't be able to dial the number.

Putting a comma after any phone number (read as a one-second pause, as with modems) allows for any such qualifying information to be added. For me this is much easier than creating hundreds of custom fields for phone numbers.
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Microsoft Word keyboard shortcut to close the sidebar Apps
Microsoft Word 2011 does not, as far as I can tell, offer a means of assigning a keyboard shortcut to close the sidebar. The AppleScript described here provides that functionality, and sets a keyboard shortcut that will trigger it.

Name the following Applescript "MicrosoftWordCloseSidebar\mosH.scpt" (notice the reversed slash) and save it in ~/Library/Application Support/Microsoft/Office/Word Script Menu Items:
do shell script "osascript -e '
tell application \"System Events\" to tell process \"Microsoft Word\"
 	set {frontmost, itemFound} to {true, false}
 	repeat with w in windows
 		tell w to repeat with g in groups
 			tell g to repeat with c in checkboxes
 				tell c to if value of its attribute \"AXHelp\" = \"Close the Sidebar\" then
 					set itemFound to true
 					exit repeat
 				end if
 			end repeat
 			if itemFound then exit repeat
 		end repeat
 		if itemFound then exit repeat
 	end repeat
end tell
' >/dev/null 2>&1 &"
When you press Command-Option-Shift-H, the close button of the sidebar is clicked, and the sidebar closes. The keyboard shortcut comes from the "mosH" part of the Applescript name (m=Command, o=Option, s=Shift, H=the letter H). That shortcut was chosen to complement the existing shortcut to open the Find/Replace Sidebar (Command-Shift-H) and may be altered to suit a particular user's needs. The script is constructed as a background osascript to get around a problem that occurs when trying to GUI-script Microsoft Word from its script menu.
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Turn off automatic attachment preview in Mail Apps
Mail, by default, provides a preview of attachments in can read, such as graphics and PDF files. However, you can run a command in Terminal to turn this off. Run the following:
defaults write DisableInlineAttachmentViewing -bool yes
Quit Mail and relaunch it. When you view a message, all attachments will be shown as icons only. To restore the original functionality, run this command:
defaults write DisableInlineAttachmentViewing -bool no
Found on StackExchange.
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How to Email Pictures from iPhoto Using Instead of iPhoto's Built-in Email Feature Apps
iPhoto 11 added an awful new built-in email service that replaces the previous functionality: when sending an email, it used to open Mail and attach the photos to a new email. Now, it uses a poorly designed, built-in email functionality that ruins everything. To send photos again using Mail, run the following command in Terminal:

defaults write EmailApp Mail

To return this functionality to iPhoto, run the following command in Terminal:

defaults write EmailApp iPhoto

(Originally found here.)
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Print large Numbers tables on one page Apps
I find frustrating the way Numbers prints large tables they're often split both horizontally and vertically across multiple pages.

One way to print a large table on a single page is to copy the table and open it in Preview. In Numbers, click the dragging square at the top left of the table. (You need to scroll to the top of the table to see it.) Press Command-C, open Preview and press Command-N. Print away.

[kirkmc adds: Interesting: if you paste a table into Preview, it's displayed with no borders or extra space, as if it were a PDF. (There's a hint explaining this.) However, when you print, make sure to select Scale to Fit, then Fill Entire Paper. I tried pasting a long table - about 300 lines - and Preview, using the default print settings, would have printed the entire table on one page.]
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Remove Genius mixes from iTunes Apps
I spotted something today in iTunes 11, which I don't recall seeing before. If you right-click on a Genius Mix icon, you can choose Remove > Genius Mix name> and delete it from the Genius Mixes list. If you want to get all your Genius Mixes back, you can right-click anywhere in the white space of that window and choose Restore All Mixes to get them all back. But you still have no control over how Genius Mixes are created.
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Create playlists in iTunes for all complete albums Apps
User Aphex5 posted an interesting question on Stack Exchange, asking if there was a way to create playlists for all complete albums in his iTunes library. He then followed up with an answer, the following AppleScript:
-- Creates a playlist for each full album you have in iTunes
-- Set the playlistPrefix and playlistSuffix as desired before running

-- Based on code by Brad Campbell

tell application "iTunes"
    set playlistPrefix to "FA: "
    set playlistSuffix to ""
    -- The "FA: " prefix will help cluster full albums in iTunes' playlists,
    -- and is narrow enough to not get in your way when viewing on an iPhone

    set albumBuckets to {} as list
    set allSongs to (every track of library playlist 1 whose enabled is true and podcast is false and kind contains "audio") as list

    -- Find all partial albums in iTunes
    repeat with currentTrack in allSongs
        set albumName to album of currentTrack as text
        set artistName to artist of currentTrack as text

        -- First check for missing values, then perform integer comparison
        -- Zero is on the left to force interger type coercion, just in case
        if album of currentTrack is not missing value and 0 is less than length of albumName then
            if artist of currentTrack is not missing value and 0 is less than length of artistName then
                if track number of currentTrack is not missing value and 0 is less than track number of currentTrack then
                    if track count of currentTrack is not missing value and 0 is less than track count of currentTrack then
                        if albumBuckets does not contain album of currentTrack then
                            copy album of currentTrack to the end of albumBuckets
                        end if
                    end if
                end if
            end if
        end if

    end repeat

    repeat with currentAlbum in albumBuckets
        set albumSongs to (every track of library playlist 1 whose album is currentAlbum)
        set firstTrack to first item of albumSongs

        -- Filter album list to act only on full albums
        if (count of albumSongs) is equal to track count of first item of albumSongs and 1 is less than (count of albumSongs) then
            -- This is a full album, construct the playlist

            -- Sort tracks by track number
            set albumSongsSorted to {} as list
            repeat with i from 1 to (count of albumSongs)
                repeat with trk in albumSongs
                    if track number of trk is i then
                        set nextSong to trk
                        copy nextSong to the end of albumSongsSorted
                    end if
                end repeat
            end repeat

            -- Don't show artist name for compilations
            if firstTrack is not compilation then
                set playlistNameArtist to artist of firstTrack & " - "
                set playlistNameArtist to ""
            end if

            set albumPlaylistName to playlistPrefix & playlistNameArtist & currentAlbum & playlistSuffix

            -- Create playlist
            if user playlist albumPlaylistName exists then
                    delete tracks of user playlist albumPlaylistName
                end try
                make new user playlist with properties {name:albumPlaylistName}
            end if

                repeat with trk in albumSongsSorted
                    duplicate trk to user playlist albumPlaylistName
                end repeat
            end try
        end if
    end repeat

    display dialog "Playlists created! Check iTunes for playlists beginning with '" & playlistPrefix & "'"
end tell
This will traverse the iTunes library and make playlists for every album where the number of tracks matches the total number of tracks for the album; in other words, if you only have one or six songs from a ten-song album, it won't make a playlist. Naturally, this assumes that you have the correct metadata for your tracks to enable this. If you don't, you can go through your albums - one by one, alas - using Doug Adams' Albumize Selection AppleScript; this script sets both track number and track count tags to the appropriate numbers.
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Change subtitles quickly in DVD Player Apps
I'm affected by a mild form of phonemic deafness: the part of my brain in charge of translating sound into words doesn't work perfectly. Therefore, understanding spoken language is more difficult for me than for the average human, even in my mother tongue (Italian). Nevertheless, I've been always fascinated by languages, and I have learned to read in a few of them.

With the advent of the DVD, movies and TV series in their original language have become available and I'm using them as a mean to improve my comprehension. Usually, I try to understand the dialogues without using subtitles, but sometimes I need to look at them (if possible, in the language of the audio track) for a while. Apple's DVD Player allows me to do so, but you need to issue a series of commands using the controller or the menus to turn them on. However, it is possible to automate this process, causing the video to scrub backwards a little, activate the chosen subtitles and start the playback again.

As a first step, you must create a new service in Automator with a single action: "Run Applescript" (located in "Utilities"). Input the following script:
tell application "DVD Player"
	rewind dvd
	delay 1  -- approximate rewind time in seconds
	pause dvd
	set subtitle to 1 -- to choose first item of available subtitles
	play dvd
end tell
Select the options "Service receives no input" and "in any application". The number after "delay" controls the amount of back-scrubbing; you may try different values to fit your taste, and "set subtitle to 1" enables the first set of available subtitles.

Save the service with an appropriate name and open the Keyboard Shortcuts tab of System Preference's Keyboard pane. Select "Services" in the leftmost section and add a keyboard shortcut that suits you for the newly created service.

You may duplicate the process above, changing "set subtitle to 1" with "set subtitle to 2", etc. to create commands that select other sets of subtitles.

As a last step, create a service with the following AppleScript:
tell application "DVD Player"
 set subtitle to 0
end tell
This will allow you to switch subtitles off.
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Use Bluetooth keyboard with Apple TV Apps
You may have seen the news: the latest update to the Apple TV (2nd generation or later) allows you to use a Bluetooth keyboard. This makes searching for things much easier; the non-keyboard interface is slow and clunky. If you want to use a Bluetooth keyboard with your Apple TV, you can see this Apple technical document which explains how to set up a Bluetooth keyboard with an Apple TV, how to disconnect the keyboard, and how to troubleshoot common problems.
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