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I can think of two possible reasons for your problem: 1) Missing file name extensions --- Many picture file types are usable on Macs or PCs, and you have not told us what the file type is that you have, and perhaps you don't know. The file type, in the PC world, is almost always determined by a (usually) 3 letter ending to a file name, that is called the file name extension.

One problem you may have, when bringing over a file (be it a picture or anything else) from a Mac to a PC is that Macs do not require a file name extension, whereas PCs do require that file name extension (there can be a very rare exception). Brew script. The PC uses those file name extensions to 'tell' the PC what sort of file it is, so that the correct application (the program used to open your file) can be started.

So, if those pictures coming from the CD, made on a Mac, are attempted to be opened on a PC, and there is no file name extension, then the PC may ask you what you want to use to open the picture with. The fix is to add an appropriate file name extension to each picture. The problem is that, while on the CD, you can't rename them (the CD makes the files (usually) unalterable. So that means you need to copy those pictures off the CD and onto your hard drive. Then you can rename the file to include an extension.

I know I am not giving you details here, but to try and do it here, not knowing what you actually have, or your ability to understand what I might say, is going to get real confusing, real fast. And do you even understand anything I have written so far? The other possibility.

2) The CD is written in a format that is not readable on the PC. --- I don't think this is you most likely possibility, since many CD formats are usable on both platforms. But there is some slight possibility.

If this is the case, then you will need to get the files into a more transportable format. Either get back to the person that gave you the CD, or ask someone what has a Mac, and some more computer knowledge than you, and see if you can get the CD re-written. While JPG, TIF, and GIF are not platform specific, without file name extensions they become problematic when trying to open them on a PC. There are PC viewers that can open extension-less graphic files, such as FREE, but without the extensions you can not direct any application to simply open the file. (There was one way, I sort of remember, that you could hack the PC to use a specific application to open otherwise non-specific files, but I forget how, or where, it was.) We also do not know what the image file types are, as of yet.

There are some image file types that are used pretty much exclusively on the Apple. Perhaps the CD used one of those types, or perhaps the CD was created using a CD slideshow program that would only run on the Apple. By the way, even with a slideshow, the individual photos may also be somewhere on the CD and in a form that IrfanView can still open. IrfanView can open many dozens of different graphic file formats, including some Apple ones. Note: you do need to also install the free plug-ins, which extend the capabilities of the basic IrfanView.