Any improvements in sharing an iPhoto Library between multiple users?

It is possible and Apple Approved to share an iPhoto Library between multiple users, but the Library must be stored on a drive or disk image that ignores permissions:
http://tech.kateva.org/2008/10/apple-supports-multi-user-iphoto.html
This doesn't work for me. Has Apple changed anything with iLife '09 to make it easier to share a Library? For example, have they changed from the prior Package format?
Message was edited by: jfaughnan

Alternatives to a trip to the Terminal:
If you want the other user to be able to see the pics, but not add to, change or alter your library, then enable Sharing in your iPhoto (Preferences -> Sharing), leave iPhoto running and use Fast User Switching to open the other account. In that account, enable 'Look For Shared Libraries'. Your Library will appear in the other source pane.
Any user can drag a pic from the Shared Library to their own in the iPhoto Window.
Remember iPhoto must be running in both accounts for this to work.
If you want the other user to have the same access to the library as you: to be able to add, edit, organise, keyword etc. The problem here is that OS X works very hard to keep your data safe and secure from the other users. You're trying to beat what's built in to the system. So, to beat the system
Quit iPhoto in both accounts
Move the iPhoto Library Folder to an external HD set to ignore permissions. You could also use a Disk Image or even partition your Hard Disk.
In each account in turn: Hold down the option (or alt) key and launch iPhoto. From the resulting dialogue, select 'Choose Library' and navigate to the new library location. From that point on, this will be the default library location. Both accounts will have full access to the library, in fact, both accounts will 'own' it.
However, there is a catch with this system and it is a significant one. iPhoto is not a multi-user app., it does not have the code to negotiate two users simultaneously writing to the database, and trying will cause db corruption. So only one user at a time, and back up, back up back up.
Lastly: This method seems a little clunky at first, but works very well. Most importantly, it uses the System to do the job for you.
Create a new Account on your Mac, call it Media. Create an iPhoto Library there. (BTW: This will work for iTunes too.)
Enable Sharing on the Library:(Preferences -> Sharing), leave iPhoto running and use Fast User Switching to open the other accounts. In those accounts, enable 'Look For Shared Libraries'. The Library will appear in the other source pane.
This means that both users will be able to see the pics. If you want to use a pic then simply drag it from the shared Library to your own in the iPhoto Window. This means that each user can have their own edits.
If you want to add photos to the Library: Log into the Media account for that purpose.
To make it all seamless: Set your Mac to log into the Media Account automatically. Set iPhoto to launch on log-in. Then switch to your own account using Fast User Switching.
Net result: a Library that's permanently available to all users but also protected. Each user can have their own versions of the pics if they want.
No partitioning, no permissions issues. Uses no extra disk space. What's not to like?
Regards
TD

Similar Messages

Sharing one iphoto library between multiple user accounts

I hav an extensive photo library and would like to share this across multiple users on the one computer. Am I able to do this without having to move the library to an external hard drive?

What you mean by 'share'.
If you want the other user to be able to see the pics, but not add to, change or alter your library, then enable Sharing in your iPhoto (Preferences -> Sharing), leave iPhoto running and use Fast User Switching to open the other account. In that account, enable 'Look For Shared Libraries'. Your Library will appear in the other source pane.
Any user can drag a pic from the Shared Library to their own in the iPhoto Window.
Remember iPhoto must be running in both accounts for this to work.
If you want the other user to have the same access to the library as you: to be able to add, edit, organise, keyword etc. The problem here is that OS X works very hard to keep your data safe and secure from the other users. You're trying to beat what's built in to the system. So, to beat the system
Quit iPhoto in both accounts
Move the iPhoto Library Folder to an external HD set to ignore permissions. You could also use a Disk Image or even partition your Hard Disk.
In each account in turn: Hold down the option (or alt) key and launch iPhoto. From the resulting dialogue, select 'Choose Library' and navigate to the new library location. From that point on, this will be the default library location. Both accounts will have full access to the library, in fact, both accounts will 'own' it.
However, there is a catch with this system and it is a significant one. iPhoto is not a multi-user app., it does not have the code to negotiate two users simultaneously writing to the database, and trying will cause db corruption. So only one user at a time, and back up, back up back up.
Lastly: This method seems a little clunky at first, but works very well. Most importantly, it uses the System to do the job for you.
Create a new Account on your Mac, call it Media. Create an iPhoto Library there. (BTW: This will work for iTunes too.)
Enable Sharing on the Library:(Preferences -> Sharing), leave iPhoto running and use Fast User Switching to open the other accounts. In those accounts, enable 'Look For Shared Libraries'. The Library will appear in the other source pane.
This means that both users will be able to see the pics. If you want to use a pic then simply drag it from the shared Library to your own in the iPhoto Window. This means that each user can have their own edits.
If you want to add photos to the Library: Log into the Media account for that purpose.
To make it all seamless: Set your Mac to log into the Media Account automatically. Set iPhoto to launch on log-in. Then switch to your own account using Fast User Switching.
Net result: a Library that's permanently available to all users but also protected. Each user can have their own versions of the pics if they want.
No partitioning, no permissions issues. Uses no extra disk space. What's not to like?
Regards
TD

HT1198 Sharing an iPhoto library between multiple users on a single Mac?

Can anyone help me solve this problem? I want to share an iPhoto library that holds all the family pictures across three other users who have separate accounts on the same iMac.

What do you mean by "share"?
If you want the other user to be able to see the pics, but not add to, change or alter your library, then enable Sharing in your iPhoto (Preferences -> Sharing), leave iPhoto running and use Fast User Switching to open the other account. In that account, enable 'Look For Shared Libraries'. Your Library will appear in the other source pane.
Any user can drag a pic from the Shared Library to their own in the iPhoto Window. Remember iPhoto must be running in both accounts for this to work.
If you want the other user to have the same access to the library as you: to be able to add, edit, organise, keyword etc.
Quit iPhoto in both accounts. Move the Library to an external HD set to ignore permissions (or a Disk Image or even partition your Hard Disk.)
In each account in turn: Double click on the Library to open it. (You may be asked to repair the Library Permissions.) From that point on, this will be the default library location. Both accounts will have full access to the library, in fact, both accounts will 'own' it.
However, there is a catch with this system and it is a significant one. iPhoto is not a multi-user app., it does not have the code to negotiate two users simultaneously writing to the database, and trying will cause db corruption. So only one user at a time, and back up, back up back up.

Sharing single iPhoto library between 2 users on a single computer

Hello,
I am currently using iPhoto 5 on a Mac Mini with 2 total users on the computer.
I know that it is easy to share iPhoto pictures over a server with other computers, but does anyone know how to share a single library between 2 users on the same computer?
I would like my wife and I to share a single library of pictures so that we can each upload pics from our digital camera of our family and friends and both have access to them. Currently, we each have to have separate libraries and it is difficult to share photos even between us. If this is not possible on iPhoto 5 or 6, this would be a great upgrade for the next version.
By the way, I was able to work a similar problem out with music out so that all users share a single iTunes library of songs by placing the library in the "shared" folder, but this is not possible with the iPhoto library.
Thanks for your help!
Mac Mini - G4 Mac OS X (10.4.6)

Hi mconnor,
Here are all the links I have for sharing an iPhoto Library.
I think you would be interested in the ACL link for your situation. Hope it works for you.
SHARING IPHOTO LIBRARIES
Sharing libraries between users on the same local network
You can also share a library on the same machine between users the same way.
Sharing libraries between users on the same machine...
-both users must have sharing enabled in their iPhoto Preferences
-both users must be logged in and have iPhoto running
-Remember that you can only view the other library. You can't edit the photos or play the saved slideshows or view the made books or burn them to CD or DVD. The books and slideshows will show up as an album. You can play that album as an "on the fly" slideshow. You can drag images from the sharing library to your library in the source column to import them to your library. You can then edit, add to albums, books, slideshow, etc.
Sharing links from Apple....
Sharing your photos between computers
About shared photos
Turning off photo sharing
Looking for shared photos
SHARING ONE IPHOTO LIBRARY BETWEEN USERS ON SAME MACHINE
You can try one of these three methods:
1- Use iPhoto Library Manager-the paid version
The documentation page will give instructions on how it is done.
2- Sharing one iPhoto library between several users on one machine
3- Share an iPhoto Library in tiger Using ACL's
4- I have also read about ShareAlike
There is no other info on the site about how it works.
I strongly urge anyone wanting to try any of the methods for sharing one iPhoto Library folder among more than one user to backup all iPhoto Library folders before attemptin anything.

HT1198 If I share an iPhoto library between multiple users, will the Faces, Events, and Places be automatically usable by all users, or will each user have to tag all the photos (e.g. if a user tags a face, will a different user have to do it in their own

If I share an iPhoto library between multiple users, will the Faces, Events, and Places be automatically usable by all users, or will each user have to tag all the photos (e.g. if a user tags a face, will a different user have to do it in their own iPhoto application??

Have you read this Apple document regarding sharing a library with multiple users: iPhoto: Sharing libraries among multiple users?
OT

Sharing one iphoto library between 2 user accounts

Hi all,
I know there are lots of questions on this, so thank you for your patience and assistance. I have spent so many hours on the phone to Apple care with no joy
I made the jump to Mac from PC several months ago, and I really like it, except for this issue. Please forgive me if my Mac tech talk is not up to scratch. It's like learning a new language (kind of).
My wife and I are using iPhoto 11 with one shared library. Computer shipped with Snow Leopard and I set up the shared folder/library using Apple article HT1198. It worked perfectly. We could add, edit, delete photos with the change being visible and fully accessible by the other user.
The day Lion got released, I upgraded. That's when all the problems started. If I add photos or videos, the thumbnails are visible, but you can not open them/view them (Permissions error) and the problem occurs vice versa as well if my wife adds photos.
So, trying to work out a solution, both with the advice of Apple support and from research:
have tried repairing the library
have changed permissions settings on hard drive and on iphoto library file
moved the library to Shared and also to the root directory of the hard drive
I have deleted the mounted virtual disk volume and now have the library file on the Macintosh HD
I have reinstalled Lion (repaired)
I have formatted the Hard Drive, reinstalled Snow Leopard, updates & then Lion - same problem!
I have used Batchmod
I have considered taking too many sleeping pills
So what does work?
When I hold down Command & Option when opening iPhoto I have the various repair options. When I select the Repair permissions option, ALL of the previously non-viewable content becomes viewable. Problem solved? Nope. When I add new material and go to my wife's account, only thumbnails visible again (if I rename an event that shows perfectly well). Close iPhoto, hold down CMD & Option, repair permissions, and again, all content accessible. So I'm assuming the permissions of what we are adding is for some reason being changed to a different setting to that of the library and the hard disk (both set to read write everyone & for each user account).
Is this my only option now? Add content and then repair permissions everytime we open iPhoto?
I'm so suprised that for what is marketed as such a user friendly computer that sharing photos is so difficult, or convoluted at least.
Anyway, I look forward to any suggestions.

Time Machine prefers to have a disk to iself, you'll find. You could, however, partition the disk.
That said, having the Library and it's back up on the same disk is unwise. If the disk fails - and that's one of the more common issues - you have no library and no back up.
Regards
TD

Sharing one Aperture Library between multiple users on the same machine

Is there a way of setting up Aperture so that two different users on the same machine have full rights to do everything?

Ian,
Thanks for the suggestion. It certanly better than nothing, but in my case there is no partition with permissions off and there are other users to whom I wouldn't want to give full rights to the library. As an alternative I thought of simply creating a special user and do all editing from it.
At any rate, it would have been useful if Aperture had something like that built in - like a preferences option, where one could specify a MacOS group name, and Aperture would do all its file/folder create operations within a given library with setgid()/setegid() of that group and corresponding umask() to give rw permissions to that group. Not too hard to do, either.

Question/Problem Sharing iTunes Library between multiple users

Hello all,
I have a question (potential problem) regarding sharing an iTunes Library between multiple users.
In the past, I had placed the iTunes folder in /Users/Shared, and created an alias to it in the "Music" folder of each user, and it worked fine. However, with a recent upgrade to Mac OS 10.5, only the Home user account can access the library.
I read the Apple Support Document http://support.apple.com/kb/ht1203 uner Mac OS X which specifically states *not* to move the iTunes folder, just the iTunes Media folder (which I don't have, would that be iTunes Music?).
Any recommendations? Should I delete the different alias, move the iTunes folder back to the home user, and then follow the instructions in the support document?
We're also looking to sync music purchsed on our iPod touches, as well as apps (which weren't supported in our privous Mac OS X version.
Any advice is appreiciated.

David Guay wrote:
... iTunes Media folder (which I don't have, would that be iTunes Music?).
yes.
specifically states *not* to move the iTunes folder
*do* keep the entire iTunes folder in /users/shared, however, instead of creating aliases, launch iTunes while holding the option (⌥) key, click choose library when prompted, and select the iTunes folder in /users/shared.
obviously, only one iTunes at a time can access the library !

How do I remove an imported iPhoto library at multiple users

There seem to be different ways of sharing an iPhoto library among multiple users on a single Mac and I guess I didn't select the best one ...
My wife and I both have an account on our Mac (I am administrator).
Originally, only on my account we viewed our photos, but my wife wanted to have the same iPhoto access via her account.Makes sense!
Via 'system preferences > share' I marked the picture folder in which the iPhoto library is stored as a 'shared folder'.
Then in my wifes account, I started iPhoto and I imported the iPhoto library file in this shared folder (and 'yes', I unchecked the option in the preferences menu to avoid copying photos on import ;-)
Well, for the next hours or so, the system started to import the photos ... although my photo library contains more then 10.000 pictures (!!) the status bar during import indicated a shear amount of ±260.000 pictures to be imported (as it turns out it includes the 'faces' as pictures).
To make a long story short - how do I restore iPhoto on my wifes account by e.g. removing/undoing the imported library. I am a bit hesitant in removing the library since it is the library stored in our shared folder and I don't want to delete that library file. I 'just' want it to turn back to the original 'empty' iPhoto on my Wife's account and share our library in a different way.
By the way, although the iPhoto library/events are a mess on my wifes account, it still looks good on my account.
Thanks.
D.

Trash the Library in your wife's account.
Never import one Library to another. Every version and thumbnail is imported like a distinct photo, you lose all your Albums, Keywords etc., the link between Original and Previews is destroyed, the non-destructive editing feature is ruined and so on. In summary: it's mess.
For iPhoto 09 (version 8.0.2) and later:
What you mean by 'share'.
If you want the other user to be able to see the pics, but not add to, change or alter your library, then enable Sharing in your iPhoto (Preferences -> Sharing), leave iPhoto running and use Fast User Switching to open the other account. In that account, enable 'Look For Shared Libraries'. Your Library will appear in the other source pane.
Any user can drag a pic from the Shared Library to their own in the iPhoto Window.
Remember iPhoto must be running in both accounts for this to work.
If you want the other user to have the same access to the library as you: to be able to add, edit, organise, keyword etc.
Quit iPhoto in both accounts. Move the Library to the Users / Shared Folder
(You can also use an external HD set to ignore permissions, a Disk Image or even partition your Hard Disk.)
In each account in turn: Double click on the Library to open it. (You may be asked to repair the Library Permissions.) From that point on, this will be the default library location. Both accounts will have full access to the library, in fact, both accounts will 'own' it.
However, there is a catch with this system and it is a significant one. iPhoto is not a multi-user app., it does not have the code to negotiate two users simultaneously writing to the database, and trying will cause db corruption. So only one user at a time, and back up, back up back up.

Share iPhoto library amoung multiple users

Hi,
I have a new G5 (with iPhoto 5.0.4).
My machine has two user accounts. I would like to have both users have access to the SAME set of pictures - both users should have FULL access (the ability to add/delete photos, modify picture metadata, etc.).
Is there an easy way to do this?
Thanks!

Hi bit,
I have links for you to check out, whether the solutions work 100% I don't know.
Sharing Libraries
Sharing libraries between computers on same local Network
Sharing libraries between users on the same machine...
-both users must have sharing enabled in their iPhoto Preferences
-both users must be logged in and have iPhoto running
Remember that you can only view the other library. You can't edit the photos or play the saved slideshows or view the made books or burn them to Cd or DVD. The books and slideshows will show up as an album. You can play that album as an "on the fly" slideshow. You can drag images from the sharing library to your library in the source column to import them to your library. You can then edit, add to albums, books, slideshow, etc.
Sharing one library between users on same machine....
Download iPhoto Library Manager (pay for it if you deccide to use it for this purpose)
iPhoto Library Manager
iPhoto Library Manager documentation
this page will show you everything you can do with iPhoto Library Manager.
On the documentation page, click the link on the left for "sharing libraries"
Or you can go here and see if you would like to do it this way:
Sharing one iPhoto library between several users on one machine
Sharing Links
Sharing your photos between computers
About shared photos
Turning off photo sharing
Looking for shared photos

Sharing iPhoto Library between Two User Accounts

Is there any way to fully share a single iPhoto library between two user accounts on one machine (iMac 2.0GHz dual core Intel, 10.5.1, iPhoto '08), without using an external drive (because I don't have one)? By share, I mean each user has full rights and priveledges to the entire library, regardless of who uploaded the pics. Holding down the option key on iPhoto startup does not work because my wife can't access the pics I loaded even though she's pointing to the shared library in a shared folder.

If you want the other user to have the same access to the library as you: to be able to add, edit, organise, keyword etc. then:
Quit iPhoto in both accounts
Move the iPhoto Library Folder to an external HD set to ignore permissions. *You could also use a dmg*.
(Some people have had success putting the library in the Users/ Shared folder. If you do this make sure the file permissions are set to allow read/write access to everyone. But that's unlikely to work on 10.5 because of the way that the permissions have changed with the new OS.)
In each account in turn: Hold down the option (or alt) key and launch iPhoto. From the resulting dialogue, select 'Choose Library' and navigate to the new library location. From that point on, this will be the default library location. Both accounts will have full access to the library, in fact, both accounts will 'own' it.
However, there is a catch with this system and it is a significant one. iPhoto is not a multi-user app., it does not have the code to negotiate two users simultaneously writing to the database, and trying will cause db corruption. So only one user at a time, and back up, back up back up.
Regards
TD

Trouble with sharing iPhoto library among multiple users

I followed the directions in this guide to share my iPhoto library between two accounts. However, it does not allow both users to open the library. One user gets a message that it is locked. I have ensured that the disk image and the library give everyone read/write access and that ownership of the volume is ignored. I've also ensured that the other user is logged out of iPhoto. However, I still get the error.
http://support.apple.com/kb/HT1198?viewlocale=en_US
I am, however, able to share the iPhoto library if I don't use the disk image and if I just store the library in the Shared folder and by giving both users read/write access. However, I'm afraid that this will someday crash on me based on this article.
Does anyone have any experience with this??

The disk image approach looks complex. I'd avoid it. Note that all the users need to have read/write access to the disk image plus the folder that it's inside of ...
The use of an external disk looks simplest and I've done that myself so I know that it works.
Also, here is another solution: http://www.fatcatsoftware.com/iplm/Documentation/iPLM/pgs/sharing.html

Sharing an iTunes Library across multiple user account and a network.

Sharing an iTunes Music Library across multiple user accounts.
Hello Everybody!
Firstly, this was designed to be run in Mac OS X 10.4 Tiger. It will not work with earlier versions of Mac OS X! Sorry.
Here's a handy tip for keeping your hard drive neat and tidy, it also saves space, what in effect will be done is an iTunes music library will be shared amongst multiple users on the same machine. There are advantages and disadvantages to using this method.
• Firstly I think it might be worthwhile to state the advantages and disadvantages to using this approach.
The advantages include:
- Space will be saved, as no duplicate files will occur.
- The administrator will be able to have complete control over the content of the iTunes library, this may be useful for restricting the content of the Library; particularly for example if computer is being used at and education institution, business or any other sort of institution where things such as explicit content would be less favorable.
- The machine will not be slowed by the fact that every user has lots of files.
The disadvantages to this system include.
- The fact that the account storing the music will have to be logged in, and iTunes will have to be active in that account.
- If the account housing the music is not active then nobody can use the iTunes library.
- There is a certain degree of risk present when an administrator account must be continually active.
- Fast User Switching must be enabled.
Overview:
A central account controls all music on the machine/network, this is achieved by storing iTunes files in a public location as opposed to in the user's directory. In effect the system will give all users across the machine/network access to the same music/files without the possibility of files 'doubling up' because two different users like the same types of music. This approach saves valuable disk space in this regard and may therefore prove to be useful in some situations.
This is a hearty process to undertake, so only follow this tutorial if you're willing to go all the way to the end of it.
Process:
Step 1:
Firstly, we need to organize the host library, I tidied mine up, removing excess playlists, random files, things like that. this will make thing a bit easier in the later stages of this process.
Once the library is tidied up, move the entire "iTunes" folder from your Home directory to the "//localhost" directory (The Macintosh HD) and ensure that files are on the same level as the "Applications", "Users", "Library" and "System" directories; this will ensure that the files in the library are available to all users on the machine (this also works for networks)
Optionally you can set the ownership of the folder to the 'administrator' account (the user who will be hosting the library.), you may also like to set the permissions of 'you can' to "Read & Write" (assuming that you are doing this through the user who will host the library); secondly you should set the "Owner" to the administrator who will be hosting the library and set their "access" to "Read & Write" (this will ensure that the administrator has full access to the folder). The final part of this step involves setting access for the "Others" tab to "Read Only" this will ensure that the other users can view but not modify the contents on the folder.
Overview:
So far we have done the following steps:
1. Organized the host library.
2. Placed the iTunes directory into a 'public' directory so that other users may use it. (this step is essential if you plan on sharing the library across multiple accounts on the same machine. NOTE: this step is only necessary if you are wanting to share you library across multiple accounts on the same machine, if you simply want to share the music across a network, use the iTunes sharing facility.
3. set ownership and permissions for the iTunes music folder.
Step 2:
Currently the administrator is the only user who can use this library, however we will address this soon. In this step we will enable iTunes music sharing in the administrator's account, this will enable other users to access the files in the library.
If you are not logged in as the administrator, do so; secondly, open iTunes and select "Preferences" from the "iTunes" menu, now click the "Sharing" tab, if "share my library on my local network" is not checked, the radio buttons below this will now become active, you may choose to share the entire libraries contents, or share only selected content.
Sharing only selected content may be useful if their is explicit content in the library and minors use the network or machine that the library is connected to.
If you have selected "share entire library" go to Step 3, if you have selected share "share selected playlists" read on.
After clicking "share selected playlists" you must then select the playlists that you intend to share across your accounts and network. Once you have finished selecting the playlists, click "OK" to save the settings.
Overview:
In this step we:
1. Enabled iTunes sharing in the administrator's account, now, users on the local network may access the iTunes library, however, users on the same machine may not.
Step 3:
Now we will enable users on the same machine to access the library on the machine. This is achieved by logging in as each user, opening iTunes, opening iTunes preferences, and clicking "look for shared music". now all users on the machine may also access the library that the administrator controls.
This in effect will mean that the user will not need to use their user library, it will be provided to them via a pseudo network connection.
As a secondary measure, I have chosen to write a generic login script that will move any content from the user's "Music/iTunes/iTunes Music" directory to the trash and then empties the user's trash.
This is done through the use of an Automator Application: this application does the following actions.
1. Uses the "Finder" action "Get Specified Finder Items"
1a. The user's "~/Music/iTunes/iTunes Music" folder
2. Uses the "Finder" action "Get Folder Contents"
3. Uses the "Finder" action "Move to Trash"
4. Uses the "Automator" action "Run AppleScript"
4a. with the following:
on run {input, parameters}
tell application "Finder"
empty trash
end tell
return input
end run
IMPORTANT: Once the script is adapted to the user account it must be set as a login item. in order to keep the script out of the way i have placed it in the user's "Library" directory, in "Application Support" under "iTunes".
Overview:
Here we:
1. Enabled iTunes sharing in the user accounts on the host machine, in effect allowing all users of the machine to view a single iTunes library.
2. (Optional) I have created a login application that will remove any content that has been added to user iTunes libraries, this in effect stops other users of the machine from adding music and files to iTunes.
Step 4:
If it is not already enabled, open system preferences and enable Fast User Switching in Accounts Options.
Summary:
We have shared a single iTunes library across multiple user account, while still allowing for network sharing. This method is designed to save space on machines, particularly those with smaller hard drives.
I hope that this hint proves to be helpful and I hope everybody will give me feedback on my process.
regards,
Pete.
iBook G4; 60GB Hard Drive, 512MB RAM, Airport Extreme Mac OS X (10.4.6) iWork & iLife '06, Adobe CS2, Final Cut Pro. Anything and Everything!!!

how to share music between different accounts on a single computer

Sharing custom display profiles between multiple users

Hello,
I'm brand new to Mountain Lion and I can't figure out how to share a custom display profile between multiple users on the same MBP. I'm a photographer and I have two users set up on my laptop - one personal and one for shooting. I'm using a Color Munki to calibrate my external monitor and the software creates a profile.
Previously, I could go into my library, copy the profile and drag it into the colorsync folder for my other user, then switch to my other user and find that profile in system preferences/displays.
I have no idea how to do this in Mountain Lion.

Let me simplify this by refering to User A and User B to represent the two separate users I've created on my MBP.
I've done some more digging and here's what I've found: In the Color Sync utility for User A my custom profile is in a user folder, represented by the name I gave the file when the profile was created. That's no problem
When I switch to the User B, there are two profiles in the Color Sync Utility named "Display". The "Display" file was created at the same time my custom profile was created, however, the file names don't match and I don't know why there are two of them.
I'm fairly certain that "Display" profile is the custom profile I want to use, but there's a problem coming down the road: what's going to happen when I profile my monitor again in 3 weeks.

Sharing iPhoto library between two user accounts on the same Mac

My wife and I each have an iPad and we share the same iMac. We each have our own user account on the iMac. She syncs with her account, and I sync with mine. This works fine in general, but we store all our photos within iPhoto on my account. She is therefore unable to sync the photos to her iPad. The same is true with the music that we keep on the iTunes in my user account.
Is there a way for her to sync so that the photos and music sync with her iPad also?

I have used a program called iPhoto Library Manager (http://www.fatcatsoftware.com/iplm/) for years and it has worked like a charm. The program handles all of the permission/subfolder aspects transparently. Our iPhoto library is stored in my wife's default location, but I have seamless read-write access to it. When I open iPhoto, I see the same thing she does, and I have complete control.
To answer your question about music, there are a couple of approaches. If you turn on Sharing in iTunes, and your wife's iTunes is set to look for shared libraries, she'll be able to have complete access to play anything in your iTunes library (as long as you have iTunes open). I believe she also has rights to copy files from your iTunes library into hers.
That's great for playback on a Mac, but what you can't do is sync an iPod/iPad/iPhone with someone else's shared library, so here's how I do it:
1) My iTunes library is our "primary" library, located in my Public folder (where other users have read-access).
2) In my wife's iTunes, library, I hit keystroke Apple-O to add content to her library, and navigated over to my iTunes Library in my public folder to select it. Once I did this, her iTunes library looked like mine.
3) The key thing is that under her iTunes Advanced Preferences, I ensure that "Copy content to iTunes library" is deselected. Otherwise, it would make a copy of my entire library on her side, and that would chew up a ton of disk space.
Note that I don't think it's entirely necessary to have the iTunes library in the Public folder. It could stay in the default location as long as you changes your music folder to have read-access by other users. I moved mine before I knew any better.
When I add new content to my library that my wife wants, we hit Apple-O from her side and add it to her library. This setup is kludgy, but a) both users can sync the music to iDevices and b) it doesn't require having two copies of everything. Note that unlike the iPhoto Library Manager solution, this is a static thing. You have to manually update the "satellite" library to keep it up to date with the main one.
I'm not in front of my Mac, so some of my notations may not be completely accurate.
Good Luck!

Any improvements in sharing an iPhoto Library between multiple users?

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