How do I move from iPhoto 11' to Lightroom 4

First thing I would do is to back up your images. To do this, you will have to go to File>Export. There, the best option to do is chose the "Kind" to be "original." This allows everything you export to be in its original format. When you click Export, a new window will display to let you chose your destination. As I said before, this will let you pick a folder that iPhoto will dump all your images in to without maintaining your current orginzation as far as events etc. That is fine because this back up is just in case something seriously goes wrong. I prefer using a external HD. You could make a folder on the internal drive, but this will create a duplicate of your images.

Once your backup is complete. The second step is to actually get all the images out of the iPhoto Library while trying to keep everything in its current state. The easiest and most simple way to do this is to use Aperture 3. If you do not own it now, you can download the 30 day trial just to be able to do this. Its the safest method I have found and well worth using the trial just for this purpose. Even if you decide to purchase it later or even delete the trial version, the pictures will be where you move them and Aperture can always reference them. The first step to this Aperture technique is to import your iPhoto Library into Aperture. You have several options of how to do this as well. Thankfully, Aperture will mirror your iPhoto Library in its structure (events etc.) Whe Aperture is open, click on File>Import> and then select iPhoto Library. A dialogue box will open and the iPhoto Library will be highlighted. In this box, you have the option to select where you want to store the files. By default, "In their cuurent location" is selected. By leaving this selected, Aperture will leave them in iPhoto's Library and simply reference them. What you should select is "In the Aperture Library." This might take some time, but eventually all your iPhoto events will be transfered in to Aperture, and you will see them in the side bar appear under the Projects & Albums inside a folder called events, that is inside a folder called iPhoto Library. Each "event" from iPhoto will now become "Projects" in Aperture 3 and will have a yellow icon next to the name of each event/project. (At this point, I am not sure if the iPhoto library is deleted and moved, or if this makes a copy of it. If it makes a copy and iPhoto Library is still there, you can simply delete the iPhoto Library and it will delete your photos which would now be duplicates any way)

The next step is to relocate masters in Aperture. What this does is actually lets you move your events out of the Aperture packaged file, but keeping every event/project in its own folder so you do not have to reorganize thousands of images. In the inspector pane on the left, you will see that you can open the iPhoto Library folder and see the Events folder. Open the events Folder and you will see a list of all the events/projects. This process is a bit time consuming. Start off by selecting your first event, and click on File>Relocate Masters For Project. When the dialogue box opens up, you will be given the option of selecting where the folder will be moved. What you can do is select your user name under favorites, select Pictures, and put them in there (or make a new folder within pictures). After you select your destination, you want to chose the Subfolder Format and select Project Name. What this does is create a folder named after your Project/Event and put all the pictures in that Event in that new folder. You will see a File name example listed at the bottom for you. Once you have that all set up, you can select Relocate Masters. Aperture will move those pictures where you selected, keeping them in their Event/Folder and maintain a clean organization. You will notice as the move takes place, a little tag icon appears in each image as its moved in the bottom right, indicating that the images are now Referenced in Aperture and not a managed master any longer.

You have to keep doing this for each project/event, one at a time. Once you are done, you are done. The files will all be organized in their respective folders in the location that you chose. The beauty of it is that they are already referenced in Aperture, and if you wanted to keep using it, you dont have to do any thing else. You can leave them there and just keep adding to Aperture as you take more pics. Secondly, you can now import them into LR by selecting them where they are, and clicking ADD in the import menu of LR. That leaves them where they are and references them as well.

If you'd like to add the IPTC data to the images as well, go in to Aperture and at the top bar menu select Metadata > Write IPTC Metadata to Master. You can do this before or after you relocate the masters. But I would do it before you import to LR.

This is the method I have used and it was the most successful without losing any of my organization in iPhoto and not duplicating any of the images. It seems a little complicating, but considering Apple gives you no choice from within iPhoto, this is the safest method to free yourself from their crap. The important thing to remember when referencing these images in Aperture or iPhoto is to never move any file once its in a folder in your pictures location and already referenced by the program. Later on, if you wanted to use iPhoto again, you can simply import this stuff again, leaving it in their location and referencing them in Aperture. That has its limitations as well, but such is life in Apples world. You really have no other choice.

The other two options are to use these two programs: iPhoto2Disk (http://www.iphototodisk.com/index.html) or PhotoShare (http://code.google.com/p/phoshare/). The first, iPhoto2Disk does cost 12.99 and is supposed to be able to let you export everything from iPhoto in its current state. PhotoShare is free, but I personally have not used it. I felt more save going the Aperture route just because I knew Aperture communicated well with iPhoto and I can easily get Aperture to do what iPhoto should have been able to do in export.

I hope this all helps!