What version of iPhoto doyhou have?
to create a new iPhoto library depress the option key and launch iPhoto - create a new library
to switch between them option launch and select library
COrruption is caused by things happening including power surges, human error, software issues, etc - hwo likely is it that these will happen? that is how likely it is for the new library to become corrupt
you probably can simply repair your existing library - depress and hold the option and command keys and launch iPhoto - rebuild the library
the only real protection against corruption and photo loss due to other reasons is a good backup
1. Make a back up.
2. Now use the 3rd party app which is recommended on here many, many times every day and is enormously successful at resovling problem. Seriously. If you have further problems then just revert to your back up.
I understand that some folks have reservations about using 3rd party apps, though once you have thoroughly checked them out it's often the correct thing to do. Do you only use Ford wrenches on your Ford Car?
3. No that app does not "mix" libraries up.
Thanks for the advice but I have lost days and days of manhours because iPhoto became corrput - it still causes me problems now as I'm living with an unpredictable library.
Apple mentioned the plug in as a possible issue - so its like Ford telling me my car will have permanent problems forever (which is what Apple said) but if I use Ford wrenches rather than a third party it might reduce the risk of the problems recurring.
I do back up, and Time Machine is great, but it's still hugely time consuming and frustrating when I have a problem.
My fundamental issue is the library is corrupt and it cant be fixed (Apple have had it in for weeks at a time).
I'll not argue with you about the analogy, except to say that using different wrenches is not the same as a plug-in to iPhoto. Using a different Oil Filter or spark plugs maybe. And remember, we have no idea if it is a plug-in, that was only a guess. Have you, for instance, ever installed a plug in? Which ones?
but I have lost days and days of manhours because iPhoto became corrput - it still causes me problems now as I'm living with an unpredictable library.
So, stop losing days and days and fix it. "living with an unpredictable library" is a recipe for disaster. You know your Library is corrupt. Why one earth would you continue to trust it? Soone that will go pear shared entirely.
You have two choices:
1. Fix it.
2. Start over from scratch with a new one.
You can't do number 1. You've tried, it didn't work.
Now Number 2 is the next step. You can do this with iPhoto Library Manager and save significant amounts of your work. Or you can just start over from scratch. Your choice, but it's most unwise to do nothing.
Your summary at the end is correct.
Which is why I asked the original question in this post of whether I can have two libraries - one historical "corrupt" one (that I just have to live with, as it has 15,000 lifetime photos) and a new one for future photos.
Apple's advice was not to use plugs ins or anything that might complicate the way iPhoto works. Therefore I'd rather not use iPhoto Library Manager or any other third party software, as there is a chance - based on Apple's advice - it might cause a problem.
My last words.
Apple's advice may well be good - but I'm not sure that's "Apple's Advice" so much as one employee. And frankly, on here we see reports of advice from Apple Store employees that is inaccurate ("iPhoto is only good for 25k photos, you can't use Photoshop and iPhoto, and others I have seen over the years).
Don't you see that these 15k photos will be in an unsafe environment? You really want to continue with that?
See above where I said
1. Make a Back up.
That means what ever you do you can still return to the current status quo. As long as you have a back up of the current - mucked-up - library, it can't get worse.
So the worst that can happen is nothing changes. The Best that can happen is it gets fixed.
Library Manager is not a plug-in and does not complicate how iPhoto works. It simplifies working with multiple libraries for a start.
And remember what exactly it does:
Download iPhoto Library Manager and use its rebuild function. (In Library Manager it's the FIle -> Rebuild command)
This will create an entirely new library. It will then copy (or try to) your photos and all the associated metadata and versions to this new Library, and arrange it as close as it can to what you had in the damaged Library. It does this based on information it finds in the iPhoto sharing mechanism - but that means that things not shared won't be there, so no slideshows, books or calendars, for instance - but it should get all your events, albums and keywords, faces and places back.
Because this process creates an entirely new library and leaves your old one untouched, it is non-destructive, and if you're not happy with the results you can simply return to your old one.
So, make a back up - that's one level of protection, and then Library Manager is non-destructive so that's double the protection.
Finally: search the forum. It is no exaggeration to say that Library Manager is recommended on here 50+ times every week for these kinds of problems. See how many folks find themselves worse off after using it.
The one thing you really cannot do is leave the photos in the damaged library. It is really, really unwise. If you don't want to use Library manager, then create a new Library
Recover the Masters from the damaged one
Import them to the new Library.
To create a new Library:
Hold down the option (or alt) key key and launch iPhoto. From the resulting menu select 'Create Library'
See above in my post, I do back up (continually).
I do see that my 15,000 photos are in an unsafe environment - that's why I asked the original question of whether I can have two iPhoto libraries.
For info, the "damaged" library has been recreated as a new library on multiple occasions. However, the problems persist.
Thank you for your advice.
Apple did it 4 or 5 times - every time they took the computer.
They rebuilt it with a new name and deleted the original.
The last time they tried they - I think - exported it to Aperture (this was before Aperture & iPhoto libraries were merged) and reimported it back as that, somehow, reinstated some of my filing, albums, names etc.
This was successful but the library has since crashed again - hence, I now need to move on with a new library for all my photos from now on.