While it is far from an ideal solution, when I want to put the Lightroom-created JPEGs in iPhoto, I've been using the following to solve #1:
- Publish to a Hard Drive folder from Lightroom, each folder named according to the events I want them to have in iPhoto
- Uncheck the "Copy Items to the iPhoto Library" box in iPhoto's Preferences>Advanced menu
- Import the folders to iPhoto
This will import these pictures by reference only; all the photos stay in their existing folder. (I usually re-check the box afterwards, so later pictures from sources other than Lightroom are actually copied). But you can set all the usually iPhoto metadata, reorganize into different events, browse thumbnails, etc.
If you modify anything in Lightroom, and republish the changes, those changes will be visible immediately when you open the picture in iPhoto. Note however, that unfortunately iPhoto does not update the thumbnail. And iPhoto uses the thumbnail for the zooming-in animation. So not only when you view it in the event display, but for a moment in the zoom-in animation, you will see the original version. But on the plus side, any metadata changes that you make will be preserved, because iPhoto stores these in the database. Only the image is external.
Also, since I don't like having another folder outside of the iPhoto database, I actually have Lightroom publish to a folder that is within the iPhoto database package. iPhoto doesn't delete anything in there that it didn't originally create, as far as I can tell. I have tried to use the "repair library" option to see if it can pull in the files (it claims to be able to recover orphans), but no luck there.
Unfortunately, iPhoto does not check when the files are removed. So it doesn't solve #2. It sort of solves #3, in that there is no additional copy.
Anyways, like I said, it's a very imperfect solution, but I've found it to work reasonably well for myself, and it's the best that I've come up with. There is a plugin that purports to be a Lightroom Publish Service for iPhoto, but it doesn't work at all (it's basically an export; it doesn't update photos).
Best of luck!
I believe this is to protect against User error - the kind of thing that happens when an inexperienced user doesn't realise that s/he has every photo in their Library selected and then opts to send to the external editor.
No, there is no setting to adjust. Nor have I ever found a way to hack the limitation.
Best Answer
Answering my own question. Here's how you do it:
You need to set it a condition for
[size][space][unicode ×][space][size 2], for example:320 × 480. Not straightforward, but it works. However, it doesn't actually care which order you put the width and height, so this one will find 320x480 images as well as 480x320 images.