mac os x
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If you’ve used a tool like DaisyDisk to analyze your Mac’s disk space usage, you may have come across a file named ‘sleepimage’ that is rather large. What is sleepimage in Mac OS X? The ‘sleepimage’ file is just what it sounds like, it’s what your Mac had in it’s memory when the machine went to sleep, creating an image of your Mac’s previous memory state.
NOTE: If a previous installation of KisMAC has been used, please make sure to delete the following files if they exist: ~ /Library/Preferences? /de.binaervarianz.kismac.plist (where '~' is your home folder) ~ /Library/Preferences? /com.kismac-ng.kismac.plist (where '~' is your home folder) ~ /Library/Preferences? /org.kismac-ng.kismac.plist (where '~' is your home folder)
KisMAC is a wireless network discovery tool for Mac OS X . It has a wide range of features, similar to those of Kismet (its Linux / BSD namesake). The program is geared toward network security professionals, and is not as novice-friendly as similar applications. Distributed under the GNU General Public License , [ 2 ] KisMAC is free software . KisMAC will scan for networks passively on supported cards - including Apple's AirPort , and AirPort Extreme , and many third-party cards, and actively on any card supported by Mac OS X itself.
Although physical MAC (Media Access Control) addresses are permanent by design, several mechanisms allow modification, or "spoofing", of the MAC address that is reported by the operating system. This can be useful for privacy reasons, for instance when connecting to a Wi-Fi hotspot, or to ensure interoperability. Some internet service providers bind their service to a specific MAC address; if the user then changes their network card or intends to install a router, the service won't work anymore. Changing the MAC address of the new interface will solve the problem. Similarly, some software licenses are bound to a specific MAC address. Changing the MAC address in this way is not permanent: after a reboot, it will revert to the MAC address physically stored in the card.
If you are running a dual-display setup, you can easily adjust the primary display monitor in Mac OS X. When would you want to do this? For example, if you have a MacBook Pro 13″ hooked up to a larger external display, and you want the external display with it’s higher resolution to become the primary display, and your MacBook Pro with it’s smaller resolution to become the secondary display. * Have both displays turned on and connected to the Mac * Open System Preferences * Click on the Display icon * Click on the ‘Arrangement’ tab * Click and hold on the white bar at the top of the current primary display * Drag the white bar across to the monitor you want to set as the new primary display for your Mac * Notice the red border that forms around the new primary screen as you drag the white bar into the arrangement, this helps you determine which screen to use * After you have set the primary display to the screen you wish to use, close System Preferences
A MAC address is a unique identifier assigned to your network card, and some networks implement MAC address filtering as a method of security. Spoofing a MAC address can be desired for multiple reasons, and it is very easy to spoof your MAC address in Mac OS X 10.4, 10.5, 10.6, and 10.7. For the purpose of this article, we are going to assume you want to spoof your Mac’s wireless MAC address.