pc won't open mac jpegs

Started Jul 26, 2006 | Discussions
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Buzzman Senior Member • Posts: 1,514
pc won't open mac jpegs
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I put some photoshop files on a cd that i saved as jpegs I put all of the files in one folder.
what do i need to do so that pc's can open my saved jpegs.
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uwe_r Veteran Member • Posts: 3,429
Re: pc won't open mac jpegs

1. How did you burn the CD?

2. Do the JPEG files have file extensions (.jpg or .jpeg) - Windows cannot determine file types by inspecting the file (as OS X), it needs the extension to identify the required application.

3. What dou you mean by "can't open" ... what happens (error message, disk does not mount...)?

Cheers,
Uwe

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Ken Leonard Veteran Member • Posts: 5,810
Re: pc won't open mac jpegs

Hmmm, as far as I know, jpegs are jpegs., No such thing as "Mac jpegs". Are you absolutely sure you saved the files as jpeg and can you read those files on your Mac?

Ken

Buzzman wrote:

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I put some photoshop files on a cd that i saved as jpegs I
put all of the files in one folder.
what do i need to do so that pc's can open my saved jpegs.
The only difference between a man and a boy - is the price of his
toys!!

Paul_S57 Regular Member • Posts: 248
Re: pc won't open mac jpegs

Just trying: you do not confuse the real JPEG files with the files with same name with a dot (.) prefixing, which OS X adds for each file in the folder? Tiny little files. Browse the list, and find the real stuff below.
Again, just trying to help.
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Best regards,
Paul

Damien Regular Member • Posts: 123
Re: pc won't open mac jpegs

Some other ideas:

  • try dragging the JPG straight into a web browser window, does that work?

  • Photoshop can save out 48bit JPEGs (16bits per R/G/B) instead of 24bit JPEGs (8bits per R/G/B) which can confuse most other software, using Irfanview you can detect what sort of file it is and see if this is the problem.

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Damien

Buzzman OP Senior Member • Posts: 1,514
Re: pc won't open mac jpegs

I am waiting for an email response to find exactly what the message. is . I saved the files as jpg's in photoshop. and burned the disk with the disk utility.
Buzz
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mikiev Senior Member • Posts: 1,092
Saved as jpeg from photoshop...

Did you use "Save as..." or "Save for Web"

"Save as..." includes resource fork data - like thumbnail view and custom icon - which can cause problems for a PC program expecting a "plain vanilla" jpeg.

"Save for Web" saves as a "plain vanilla" jpeg - with data only, no resources.

I also use "Save for Web" for photos I send via email - so people using a PC don't get 2 copies of every attachment: one with the picture [containing data], and the other one (which they can't open) [containing resources].

Mike
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mikiev Senior Member • Posts: 1,092
Disc Utility

If they can't read the CD, Disc Utility may have been set to burn a Mac-only [HFS+] volume... but I thought it defaulted to Mac & PC compatible [like Toast does].
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uwe_r Veteran Member • Posts: 3,429
Re: Saved as jpeg from photoshop...

mikiev wrote:

Did you use "Save as..." or "Save for Web"

"Save as..." includes resource fork data - like thumbnail view and
custom icon - which can cause problems for a PC program expecting a
"plain vanilla" jpeg.

Are you sure about that? I always use "save as..." from CS2 and never had a problem on any PC under Windows 2000 or XP? Even Windows own image/fax viewer displays these JPEGs correctly.

Cheers,
Uwe

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Jim Merwin New Member • Posts: 20
Re: Disc Utility

Buzzman, why did you start a new thread? People here are trying to help you already and have posed some important questions that are critical to resolving your issue.

Buzzman OP Senior Member • Posts: 1,514
Re: Disc Utility
  • the person with the burned cd is out of state, so it is difficult to problem solve . i thought it would be easier just to figure out how to burn a new copy for that i know a pc will open. They haven't emailed me exactly what the message states, or if the cd opens or just the individual files won't open..

Buzz
The only difference between a man and a boy - is the price of his toys!!

Bimthecat Senior Member • Posts: 2,642
You must have a PC

You must have a PC

....only someone with a PC would think there was such a thing as an 16 bit jpeg

(there is not....jpegs are only 8 bit)

SUBY Senior Member • Posts: 1,772
Re: You must have a PC

Bimthecat wrote:

You must have a PC

....only someone with a PC would think there was such a thing as an
16 bit jpeg

(there is not....jpegs are only 8 bit)

Hmmm, constructive comment there with a slight hint of sarcasm to make people feel superior about themselves when replying. Not really necessary in any forum really.

uwe_r Veteran Member • Posts: 3,429
Re: pc won't open mac jpegs

Damien wrote:

  • Photoshop can save out 48bit JPEGs (16bits per R/G/B) instead of

24bit JPEGs (8bits per R/G/B) which can confuse most other
software, using Irfanview you can detect what sort of file it is
and see if this is the problem.

??? Any possibility you are mixing something up here? You can indeed generate a 48 bit per pixel floating point bitmap from JPEGs using PS' Merge to HDR function, but a JPEG is limited to 8 bits per channel / 24 bits per pixel. Saving to JPEG will always generate a 8-bit image; you can also check this in PS easily: change an images mode to 16bit and the open the "Save as..." dialog - you will find that JPEG is not even an available format for this operation.

Cheers,
Uwe

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BobNL Veteran Member • Posts: 5,046
Are they by any chance CMYK?

You can save as cmyk jpg but somehow those are often not readable on a PC. Not sure why but experienced it several times.

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wilfredmrand Senior Member • Posts: 2,340
Does the disk show up?

When you mount the burned CD does it show up in windows exploere (MyComputer, probably drive D:\)? Is there a directory? If none of this happens either the CD is defective or something went wrong with the burn. When you go to the Add Hardware control panel in Windows, can the OS 'see' the drive (click properties)....can you re-map it to the usual drive letter? This trick has worked a couple times for me.

I transfer between my Macs at home and PCs at work all the time - almost never do I experience as issue, though once U had a bad CD and twice the Add Harware thing worked because I had fouled up drive mapping when I hot-swapped a USB Compact Flash reader.

A jpeg is a jpeg, and Macs burn both Mac and Windows formats simulatneously.
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Buzzman OP Senior Member • Posts: 1,514
Re: Does the disk show up?
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I don't know the specifcs. I made the cd for someone else and they are out of state.
Buzz
The only difference between a man and a boy - is the price of his toys!!

KAllen Veteran Member • Posts: 3,837
Re: pc won't open mac jpegs

When I've had a complaint about my PC wont open your Mac jpg's, the reason has always been because the user is using some rubbish software that can't handle the file size. Ask them which software they are using, if the reply is "Microsoft something" that will be the problem.

Kevin.

mikiev Senior Member • Posts: 1,092
Save as...

I know PS Elements had that problem, and I started using "Save for Web" because of it...

If they have fixed the problem, I wouldn't know because I've been using "Save for Web" out of habit ever since.
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kaister Forum Member • Posts: 76
Re: Save as...

i have had problems burning jpgs in a folder on a cd, pcs at camera stores sometimes can't read 'pccompatible' cds burnt from a mac with subdirectories - make sure the jpgs are sitting in the main directory on the cd, not in a sub folder

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