Hi dinglydell2,
The picture formats that are supported by Photo Stream are described in this article -
iCloud: Shared Photo Streams FAQ
http://support.apple.com/kb/HT5903
In particular -
Shared Photo Streams supports JPEG, TIFF, PNG, and most RAW photo formats. On your Mac or PC, your photos are downloaded and stored in full resolution. On your iPhone, iPad, iPod touch, and Apple TV, your Photo Stream photos are delivered in a device-optimized resolution that speeds downloads and saves storage space. While actual dimensions will vary, an optimized version of a photo taken by a standard point-and-shoot camera will have a 2048 x 1536 pixel resolution when pushed to your devices. Panoramic photos can be up to 5400 pixels wide.
If the Preview application can open your photos, you may be able to export them to a more compatible format.
Preview 5.x: Convert graphic file types with Preview
http://support.apple.com/kb/PH5910
The process is the same for more recent versions of Preview.
- Open a file in Preview, and choose File > Export.
- Choose a file type from the Format pop-up menu. If you don’t see the file type you want, hold down the Option key as you click the Format pop-up menu to see specialized or older formats.
Depending on the file format you choose, additional options may appear. If you choose JPEG or JPEG 2000, you can adjust the image’s quality. If you choose PDF, you can choose a Quartz filter to apply to the image, and you can encrypt the image so that only those with the password can view it.
- Type a new name, or choose a new location for saving the converted file, and then click Save.
Thanks for using Apple Support Communities.
Best,
Brett L
