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WHen a .dmg file shows up on the OS X desktop, it acts like a new drive with its' own directories and files.
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WHen a .dmg file shows up on the OS X desktop, it acts like a new drive with its' own directories and files.

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bjoan &nbsp; or is it joanb &nbsp; you do know ofcourse you can have only one user account with EE (blew your cover by asking the same question :&gt;)
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bjoan   or is it joanb   you do know ofcourse you can have only one user account with EE (blew your cover by asking the same question :>)

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Close it.<br />
<a href="https://www.experts-exchange.com/questions/20315697/need-help-with-a-file-program-extension.html" rel="ugc">https://www.experts-exchange.com/questions/20315697/need-help-with-a-file-program-extension.html</a>
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Close it.
https://www.experts-exchange.com/questions/20315697/need-help-with-a-file-program-extension.html [https://www.experts-exchange.com/questions/20315697/need-help-with-a-file-program-extension.html]

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we have a file/program with a .dmg extension<br />
our understanding is that it is a Macintosh program<br />
OS X Disk Image File<br />
We do not know what a disk image file is<br />
could somebody please explain it to us and how do we go about opening up the file<br />
do we need a specific software program to open it up ??<br />
is it a valid file/program when it has a .dmg extension ?<br />
your help with this matter is greatly appreciated<br />
<br />
Thanks, Joan
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we have a file/program with a .dmg extension
our understanding is that it is a Macintosh program
OS X Disk Image File
We do not know what a disk image file is
could somebody please explain it to us and how do we go about opening up the file
do we need a specific software program to open it up ??
is it a valid file/program when it has a .dmg extension ?
your help with this matter is greatly appreciated

Thanks, Joan

need help with a file extension

Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. For large systems, the operating system makes sure that different programs and users running at the same time do not interfere with each other. The operating system is also responsible for security, ensuring that unauthorized users do not access the system. Operating systems provide a software platform on top of which other programs, called application programs, can run.