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View tweets made by your contacts System 10.8
If you have Twitter handles for your friends and colleagues in your Contacts, you can easily view tweets those people have made. Just open a card in Contacts, click on Twitter, then choose View Tweets. If you have the official Twitter app installed, it will open displaying tweets from that person. If not, a web page will open on the Twitter web site.

You can also tweet to someone from OS X by clicking on Twitter, and choosing Tweet, as long as you have set up your Twitter account in the Mail, Contacts & Calendars pane of System Preferences.

While viewing tweets is nice, it would be even better if they could open in one's favorite Twitter client. But that would presumably involve hacking Contacts. Anyone interested in trying to figure it out?
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Take screenshots of sheets with Command-Shift-4 System 10.8
I'm not sure when this became available, but I don't seem to remember it happening before 10.8. You can now take screenshots of sheets within a window by pressing Command-Shift-4.

A sheet is a dialog that drops down from a window, but is attached to that window. To take a screen shot of one, press Command-Shift-4, then press the space bar, which displays a small camera cursor that you use to select the window to shoot. If you want to take a screenshot of a sheet, press the Command key, and you can select only that sheet, and not the entire window behind it.

You can try this by going to the Finder and pressing Command-Shift-G, or choosing Go > Go to Folder; what displays is a sheet.

[kirkmc adds: I certainly didn't know this, and don't find it anywhere on the site.]
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Re-Enable Apple provided Java applet plug-in System 10.8
If you installed the Java for OS X 2012-06 update, you'll have found that it does the following:

"This update uninstalls the Apple-provided Java applet plug-in from all web browsers. To use applets on a web page, click on the region labeled "Missing plug-in" to go download the latest version of the Java applet plug-in from Oracle."

If you wish to re-enable the original Java applet plug-in - which is not uninstalled, as claimed above, but simply disabled - Apple has published a technical note explaining how to do this. There are a few Terminal commands, including creating a couple of symlinks. The technical note also explains how to disable Java Web Start.

The technical note also gives a URL where you can download the Oracle Java 7 JRE, which will be the future version of Java for OS X.
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Change default Calendar alert and time System 10.8
You can change the default calendar event sound and all day event time. These settings are stored as part of each individual calendar.

Locate and open in TextEdit:
~/Library/Calendars/UUID.calendar/LocalDefaultAlarms/EventAllDayAlarms.icsalarm ~/Library/Calendars/UUID.calendar/LocalDefaultAlarms/EventTimedAlarms.icsalarm

The default all day event time can be changed to 6 am, for example, instead of 9 am:

You can change the default event time to values not available in the preferences. This can be a positive or negative value, for instance 3 hours before:

The alert sound can be specified (without a file extension) using anything in your user or system sound folder:

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Workaround problem saving photos from Mountain Lion Mail to iPhoto System 10.8
Apple recently published a technical note about a problem saving photos from Mail to iPhoto in Mountain Lion. I actually came across this problem recently, and there was no feedback suggesting that the photos were not saved. Fortunately, I had a Time Machine backup of the email containing photos in question.

The fix is simply this: launch iPhoto, then drag the photos - one by one - from the e-mail onto the iPhoto icon in the Dock.
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Use an SSD boot drive and keep Users on an encrypted data drive System 10.8
Recently I became so sick of the slowness of my MacBook Pro (late 2011 model), which has a 2.4 GHz Intel Core i5 with 16 GB RAM running Mountain Lion 10.8.2, that I decided to buy a 120 GB Kingston SVP 200 SSD drive for my boot drive and put my previous 500 GB Hitachi HD in place of the DVD drive.

I left my old system in place on the old drive and did a clean install of Mountain Lion 10.8.2 on the SSD. I then set up my main user account with the same name and password as before. In the Users & Groups preference pane, I right-clicked on my account name and selected Advanced Options, and set the location of my user account to be my old user account on the secondary drive now named Data HD. Obviously, for all permissions to work correctly you need to keep the new user names and passwords the same as the old ones. That all worked fine, and when I rebooted and logged in to my account, all my Users are on the Data HD. I then used Migration Assistant to pull over all my Apps to the SSD boot drive.

Encryption of Data HD

Control-click on a disk in the Finder to encrypt to encrypt it (in a Finder window, the Finder sidebar, or on the Desktop). Choose Encrypt "disk name" and enter a password. Youíll have to enter the password a second time, and you wonít be able to go any further unless you also enter a password hint. I tried this method and it didnít appear to work properly so I used the Terminal approach.

Prepare a disk by converting

You encrypt disks with the diskutil command, but first, you have to convert them to a format called CoreStorage. Start by running the diskutil list command, which returns a list of all your disks, like this:

Vinces-MacBook-Pro:~ vince$ diskutil list



0: GUID_partition_scheme *120.0 GB disk0

1: EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh SSD 119.2 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3



0: GUID_partition_scheme *500.1 GB disk1

1: EFI 209.7 MB disk1s1

2: Apple_HFS Data HD 499.8 GB disk1s2



0: GUID_partition_scheme *500.1 GB disk2

1: EFI 209.7 MB disk2s1

2: Apple_HFS CCC Backup 499.1 GB disk2s2
The disk I want to encrypt is Data HD and to the right of the name you can see the identifier which is disk1s2. With that information I could convert that disk the CoreStorage format with the following command:
sudo diskutil corestorage convert disk4s1
Terminal will request your administratorís password, then will begin the conversion process.
Vinces-MacBook-Pro:~ vince$ sudo diskutil corestorage convert disk1s2
Started CoreStorage operation on disk1s2 Data HD
Resizing disk to fit Core Storage headers
Creating Core Storage Logical Volume Group
Attempting to unmount disk1s2
Switching disk1s2 to Core Storage
Couldn't unmount disk1s2; converted volume won't appear until it's unmounted
Core Storage LVG UUID: 5896188D-5D8C-4A8D-95BB-3D0DC892CBF4
Core Storage PV UUID: 9A70E1FB-5FEE-445B-8E92-04EC42C32D5E
Core Storage LV UUID: EB1BD441-D493-4C2B-B6E4-A646667D79C0
Finished CoreStorage operation on disk1s2 Data HD
Encrypt the disk

The important information above is the LV UUID, or logical volume universally unique identifier. Using that information, you can then run the command to encrypt the disk, as follows:
Vinces-MacBook-Pro:~ vince$ sudo diskutil corestorage encryptvolume EB1BD441-D493-4C2B-B6E4-A646667D79C0 -passphrase password
Started CoreStorage operation on disk2 Data HD
Scheduling encryption of Core Storage Logical Volume
Core Storage LV UUID: EB1BD441-D493-4C2B-B6E4-A646667D79C0
Finished CoreStorage operation on disk2 Data HD
Replace password with your password. The next step will ensure that the Data HD gets mounted during the boot process so that your accounts are available. For this you need the excellent program Unlock by Justin Ridgewell. Full instructions for installation are on his page.

His script runs as follows:
Vinces-MacBook-Pro:~ vince$ curl | bash
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  2853  100  2853    0     0   1277      0  0:00:02  0:00:02 --:--:--  1971
Attempting to re-run as root...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  2853  100  2853    0     0   1486      0  0:00:01  0:00:01 --:--:--  1864

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   509  100   509    0     0    314      0  0:00:01  0:00:01 --:--:--   385
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   139  100   139    0     0     80      0  0:00:01  0:00:01 --:--:--    99
100 27900  100 27900    0     0   7686      0  0:00:03  0:00:03 --:--:-- 76438

Do you want to unlock Data HD at boot? (y/N)
What is the passphrase used to encrypt Data?
*Enter passphrase for Data HD*
Following conversations with Justin, it is probably worth checking that you have an entry for Unlock: Data HD in the System Keychain. Also the script will be installed at /Library/LaunchDaemons/name.ridgewell.unlock. He also advised setting up another Admin account on the SSD in case one ever needed to do an decrypt the Data HD in case anything goes wrong. The command for that, using the example of my Data HD above, is:
diskutil cs decryptvolume EB1BD441-D493-4C2B-B6E4-A646667D79C0 -passphrase password
Obviously a bit of clean-up is necessary. For instance, all the Application icons in the Dock will be referencing the Applications on the original hard drive, so you need to delete each one and replace them by dragging the Applications to the Dock that were moved to the new SSD. Finally, I used Carbon Copy Cloner to copy the user folder from Data HD to another drive, re-formatted the Data HD to remove all the Applications and System files, and then cloned the User folder back to the Data HD. Then I tested all my Applications to make sure everything was working. So far so good and the performance increase is well worth the effort. Boot time is down to 10 seconds and all Applications open instantly!

[kirkmc adds: I wrote a Macworld article about disk encryption a couple of months ago. This hint uses that process, but goes a bit further.]
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List of OS X dictation commands System 10.8
Mountain Lion's dictation feature may not be as good as a dedicated speech recognition program (read: Nuance's Dragon Dictate), but it's good for those who only want to dictate from time to time. Apple has published a tech note about the dictation feature, listing all the commands that are possible. This shows you which types of punctuation you can use, but also how to make capital letters, go to new lines and new paragraphs, how to get numerals typed and more.
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Menu item to change display modes in Mountain Lion System 10.8
If you are missing the menu bar item that lets you change the display modes in Mountain Lion, there's an app for that.

Display Menu is free from the Mac App Store, and it seems to work. I really don't understand why Apple removed the menu bar item in the first place...
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Create Outlook-like reminders for Mail System 10.8
I wanted Mail to remind me to follow up on a given e-mail, as Outlook does. I realized that Reminders and Mail can do just that.

If you want to set a reminder to follow up on an e-mail, just open Reminders, and without even switching back to Mail, drag the e-mail you want to be reminded about to Reminders. It will create a new task with a link to your specific e-mail. You may add an alert, and you will never forget to follow up on an email again.

[kirkmc adds: This isn't very different from this hint, but it puts it in a different context. I hadn't used Outlook in ages, but its Follow Up menu item (in a contextual menu when you right-click on an e-mail) is very practical.

I'm still amazed that there is no direct link between Mail, Reminders and Calendar. This hint seems a good way to connect them, though it requires several steps. In Outlook, you have a number of default follow up times, whereas here you need to set the date and/or time of the reminder manually. Note to automator experts: I tried to create a workflow that would do this, but it wouldn't let me set a time. Feel free to try and build something useful.]
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Calm that bouncing dock icon System 10.8
Are you tired of apps bouncing Dock icons for attention? I've noticed that, with Aperture and Word 2011 in 10.8, if an icon bounces in the Dock for attention, and you want it to stop but don't want to switch to the program, you can just hover your mouse over the app icon in the dock. The bouncing stops.

[kirkmc adds: It was hard for me to get an app to bounce a Dock icon to test this, but I was able to do so with Word, and it works as described. I have to say that I don't see many bouncing Dock icons any more, perhaps because of Notification Center.]
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