If you have no experience with shared folders on Mac OS X, follow this step by step guide.

For Mac OS 10.5 or higher:

Basically, any Mac folder can be transformed into a shared folder.

Go to Sharing in System Preferences. This will bring up a screen similar to this one

Enable File Sharing (the lock at the bottom left must be open) and click on the + sign under the Shared Folders column. Browse to the folder of your choice and click Add.

Now the Sharing window should look like this

Close System Preferences, your shared folder is now accessible by PhotoToMac.

You only need to configure the shared folder once.

Additional remark: Make sure that the shared folder is not located somewhere in another shared folder, because your Mac will only expose the top level shared folder.

For Mac OS 10.4:

Tiger uses a simplified sharing system that gives guest access to your account’s Public folder only.

Go to Sharing in System Preferences and enable Personal File Sharing. Your Public folder - and only your Public folder - can now be used by PhotoToMac to transfer photos to.

If these settings and permissions are all set correctly, PhotoToMac can transfer Camera Roll photos to your Public folder.