Reading MAC files with no extension on PC

I
Posted By
imnsi
Apr 6, 2004
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564
Replies
20
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Closed
Some files I have been working with have no extension, because MAC’s don’t seem to like file extensions. To gain access to view these files I have to rename the files with a certain extension but its a guess and check effort. Also Quicktime PictureViewer can see the pictures. Does anyone know of a way to browse them? Is there a plug-in for photoshop 7 to view them? Or a stand alone program? Any assistance is of help! Thanks in advance.

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L
larry
Apr 6, 2004
Try "File>Open As" and it will convert the file to a PSD, if it isn’t already.

Larry Berman
HK
Harron_K._Appleman
Apr 6, 2004
Imnsi,

…because MAC’s don’t seem to like file extensions.

It’s not that Macs don’t like file extensions; they don’t need them. The Mac’s newest operating systems (OS X) are, at least, more aware of file extensions (because of its Unix roots) and easier by design to network with Win machines, making it less likely you’ll see files without extensions down the road.

There are, however, many Mac users still on the older "classic" OS, and your best bet is to ask such users to — pretty please — save with filename extensions. It’s usually a simple matter of checking a box in their application’s preferences.

There are standalone file viewers, such as Quick View Plus < http://www.avantstar.com/intradoc-cgi/idc_cgi_isapi.dll?IdcS ervice=SS_GET_PAGE&ssDocName=QuickViewPlusOverview>, that do an excellent job of letting you view just about any file — image or otherwise — even those saved without a filename extension. I am not, however, aware of any utilities that will automatically determine file types and add the right extensions.

If you can get removable media containing the image files directly from those Mac users who refuse to save with extensions, you can use a Mac disk reading utility, such as Transmac <http://www.asy.com/scrtm.htm>. Most such utilities will maintain a table of Mac file associations and Windows filename extensions, giving you the option to add extensions automatically when you copy the files to a local Win drive.

More info here < http://developer.apple.com/documentation/MacOSX/Conceptual/B PFileSystem/Concepts/FilenameExtensions.html>.

=-= Harron =-=
MM
Mac_McDougald
Apr 7, 2004
That won’t convert anything.
If file with no extension is a TIFF and you do Open As: Tiff, it will open it.
If file is a PSD and you do Open As: PSD, it will open it.

If file is a PSD and you do Open As: Tiff, it will not open it.

And so forth. Any "conversion" will happen when you decide to resave it as whatever file type.

Mac
Q
quicktiming
Apr 7, 2004
wrote in message news:…
Some files I have been working with have no extension, because MAC’s
don’t seem to like file extensions. To gain access to view these files I have to rename the files with a certain extension but its a guess and check effort. Also Quicktime PictureViewer can see the pictures. Does anyone know of a way to browse them? Is there a plug-in for photoshop 7 to view them? Or a stand alone program? Any assistance is of help! Thanks in advance.

Use the ‘get movie properties’ command in QuickTime and choose the picture or video track (probably video track) from the left pop-up, then choose ‘format’ from the right pop-up. It’ll tell you what format the files are in, then you can just add the proper extension.

Also, Macs are fine with extensions, and Photoshop on the Mac will write the proper extension is prefs are set to do so. Macs don’t need extentions, but it doesn’t hurt to have them. Just ask your source for the file to set the prefs in Photoshop to add the extension when saving.

Clifford VanMeter
Illustrator • Designer • Webslinger
http://quicktiming.org • http://ursamajormedia.com
L
larry
Apr 7, 2004
You’re correct. I should have tested my theory first.

But you can use "File>Open As" to test if the image is a commonly image file by changing what it’s opening as.

Larry Berman
BL
Bill_Lamp
Apr 8, 2004
If you open a extentionless graphic file in Irfanview, it will tell you what the file type is and offer to save it WITH the extension added. That sure beats opening it in notepad & reading the file header before manually renaming it.

Bill
MM
Mac_McDougald
Apr 8, 2004
Yep, good point. IrfanView is amazing.

Mac
HK
Harron_K._Appleman
Apr 8, 2004
Hmmm…

Is there some options setting in IrfanView that will trigger that behavior, Bill?

I can open extensionless files using the Open command and get info about them using the Info command, but I don’t see where the file type is identified, and I don’t get an offer to rename with extension.

I do see the option to flag and rename files with incorrect extensions, and that works fine for me, but it does nothing for extensionless files.

(IrfanView version 3.85)

=-= Harron =-=
MM
Mac_McDougald
Apr 8, 2004
Correct.
Iview offers no options for extensionless files. If they are valid file types, it merely opens them.

"ask to rename if incorrect extension" is a yes/no option (yes by default).

Mac
HK
Harron_K._Appleman
Apr 8, 2004
So… IrfanView is amazing, but not that amazing?

#8~o
MM
Mac_McDougald
Apr 8, 2004
I dunno, it’s pretty amazing in general.

Will open truncated files that PS gives up on.

Mac
HK
Harron_K._Appleman
Apr 9, 2004
…it’s pretty amazing in general.

Agreed. And although it’s officially freeware, Irfan Skiljan does accept $10 cash donations (see info at his site). I urge all who have benefited from his work to further encourage him.

=-= Harron =-=
BL
Bill_Lamp
Apr 9, 2004
I may have been wrong (it sure looks like I was but I’m not at my graphics computer to re-check) and it is only incorrect extensions that it will change. If so, I apologize.

But, using a bulk renamer to name all the no-extention files to <filename>.TIF then clicking on the first one & using the right arrow to go from file to file to trigger a rename to the correct extension would work. I know darn well I have done this.

Bill
MM
Mac_McDougald
Apr 9, 2004
Command line in Windows is easy for this.
Get into folder of unnamed images.
ren *.* *.tif
will do it.

Mac
MM
Mac_McDougald
Apr 9, 2004
doesn’t show well here,
that’s
ren *.*space*.tif

M
BB
brent_bertram
Apr 10, 2004
Mac,
There are only 3 of us on this forum old enough to know what you mean by "command line " . <G>
P
Phosphor
Apr 10, 2004
"There are only 3 of us on this forum old enough to know …"

a-HEM!…::squeek!::

I’m just happy I rarely need to deal with Command Line routines anymore, though I DO like the fact that with OS X, I have easier access to it on the very rare occasions where I might need it, compared to its shrouded, buried, hidden access under Classic Mac OS. And that, for all but the most obscure functions, there are developers who’ve created little utilities that put an easy-to-deal-with GUI on many of the functions and services that would have formally required serious book-larnin’.

Viva la Mac! Viva la independent developers!
HK
Harron_K._Appleman
Apr 10, 2004
Actually, if all of the files in the folder are extensionless…

ren[sp]*[sp]*.tif

….will do the trick.

Less typing.

#8~)
MM
Mac_McDougald
Apr 11, 2004
Creak…

M
MM
Mac_McDougald
Apr 11, 2004
Look, another Methuselah !

Mac

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