Print-screen (screenshots) in Mac OS X

November 12, 2012 - 9:04pm - by admin

Keyboard shortcuts

• Command-Shift-3: Take a screenshot of the screen, and save it as a file on the desktop


• Command-Shift-4, then select an area: Take a screenshot of an area and save it as a file on the desktop


• Command-Shift-4, then space, then click a window: Take a screenshot of a window and save it as a file on the desktop


• Command-Control-Shift-3: Take a screenshot of the screen, and save it to the clipboard


• Command-Control-Shift-4, then select an area: Take a screenshot of an area and save it to the clipboard


• Command-Control-Shift-4, then space, then click a window: Take a screenshot of a window and save it to the clipboard

In Leopard and later, the following keys can be held down while selecting an area (via Command-Shift-4 or Command-Control-Shift-4):

• Space, to lock the size of the selected region and instead move it when the mouse moves


• Shift, to resize only one edge of the selected region


• Option, to resize the selected region with its center as the anchor point

Formats

Different versions of Mac OS X have different formats for screenshots.

• Mac OS X 10.2 (Jaguar): jpg


• Mac OS X 10.3 (Panther): pdf


• Mac OS X 10.4 (Tiger) and later: png

In Mac OS X 10.4 and later, the default screenshot format can be changed, by opening Terminal (located at /Applications/Utilities/Terminal) and typing in:

defaults write com.apple.screencapture type image_format

killall SystemUIServer

Where image_format is one of jpg, tiff, pdf, png, bmp or pict (among others). If you omit the second line, you will need to log out and in again for the change to take effect.

Grab and Preview

Instead of using the keyboard shortcuts above, screenshots can be taken by using the Grab application included with Mac OS X. It is located at /Applications/Utilities/Grab.

In Mac OS X 10.4, the Preview application can also be used to take screenshots, by using the Grab submenu in the File menu.

From the Terminal

The screencapture command in the Terminal can also be used to capture screenshots, and is useful for scripts. Here is an example.

screencapture -iW ~/Desktop/screen.jpg

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Mac OS X Lion: configure: error: C compiler cannot create executables

November 24, 2011 - 9:31pm - by admin

After Xcode installation and trying to build mc I've got:

configure: error: C compiler cannot create executables

Google offers to install Xcode correctly (this is a different story however) or to reinstall it. Hmmm. Good idea but in my case the following simple action solved the issue: symlinks for compilers - that's all ! KISS

sudo ln -s /usr/bin/llvm-gcc-4.2 /usr/bin/gcc-4.2

sudo ln -s /usr/bin/llvm-g++-4.2 /usr/bin/g++-4.2

Voila !

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