Oops I forgot to also mention -NOTE On first launch, Photos asks if you’d like 
to use iCloud Photo Library. 
I would recommend you DON’T use iCloud Photo Library at this time.

> On 27 Apr 2015, at 11:39 am, Ronni Brown <[email protected]> wrote:
> 
> Oh Peter,
> 
> I said I would get back to you when possible, I wish you had waited.  I am 
> busy with Clients work and really don’t have time at present but reading your 
> email I decided to reply to try to explain quickly how the process works.
> 
> What you are now doing is Creating a NEW iPhoto Library (Duplicating all the 
> Media Files in iPhoto Library package)!
> You are not understanding the iPhoto & Photos Directory structure... and how 
> ‘Hard Links’ work so there is no duplication or extra space required on the 
> system.
> 
> The Transition/Import from iPhoto to Photos has to be done on your wife’s MBP 
> where the Library files are in the correct locations to link the two 
> libraries using ‘Hard Links’. 
> 
> Hard Facts about Hard Links
> On import, Photos makes a Hard Link to all iPhoto media assets in its own 
> library package, using the same directory structure as iPhoto (The libraries 
> say they’re roughly the same size, but in fact, they’re sharing disk space 
> via hard links).
> Think of hard links as a cousin of Finder aliases—rather than existing in one 
> place with an alias in a different location, files that are 'hard linked' 
> appear to live in two places at once, but only take up the space of a single 
> file.
> 
> Your old library won't be converted, just imported, so you can still open it 
> in Aperture or iPhoto if you like (though once you import, if you do anything 
> new with that library in Aperture, it won't carry over to the Photos version).
> 
> So what happens if you edit one of those files? Something clever: if I edit a 
> file from a migrated iPhoto library in Photoshop, that version is altered—but 
> the version in the Photos library is untouched. 
> Basically, the act of modifying a hard-linked file causes the link to break. 
> Now there are two different files, both taking up disk space, living 
> independently.
> For Mac users accustomed to the a-file-is-a-file approach of the Finder, this 
> one’s a bit of a head-scratcher, but it’s a smart move by Apple to allow us 
> to migrate to Photos without duplicating an entire library and eating all of 
> our free disk space—or worse, never bothering to upgrade to Photos because we 
> don’t have the room.
> 
> The new Photos library references the same master images as your old library, 
> so you don't need the space to store images twice. It also makes for an 
> incredibly efficient migration process.
> ---
> But because of your initial (dare I say - stuffup) this hasn’t happened. How 
> to correct it?? I need more information - what is on your wife’s MBP.
> From what I can ascertain from your emails - 
> A). On your wife's MBP  in her User Home Folder > Pictures - there are these 
> two files "iPhoto Library.migratedphotolibary” and  "Photos 
> Library.photoslibrary"… Is this correct? 
> B). And your wife's MBP only has ONE iPhoto Library on her system... is this 
> correct?
> C). And when you try to open PHOTOS on her MBP it doesn’t open... is this 
> correct - or what happens?
> 
> One suggestion I will make:
> On her MBP - If she double-clicks on the  "Photos Library.photoslibrary" does 
> it open in PHOTOS?
> If  NOT 
> Hold down the Option key as you open the PHOTOS app in the Dock to see the 
> 'Choose Library dialog' window.
> Click 'Other Library' 
> Select the 'iPhoto Library.migratedphotolibrary'
> See if that completes the ‘preparing for import’ 
> 
> Cheers,
> Ronni
> 
> 
>> On 27 Apr 2015, at 6:26 am, [email protected] 
>> <mailto:[email protected]> wrote:
>> 
>> Thanks Ronni. I think I've cracked it.  I opened iPhoto with Option held and 
>> selected "Create New". I set a new location for the new database library 
>> file. Once that was set up, I then selected Import and pointed to the 
>> "transitioning" iPhoto Library that I've been unable to open up in the 
>> conventional way. So last night it was able to commence the import of the 
>> photos and i can see the images on screen as it counts down. The 
>> transitioning Library was ~250GB and I had no choice but to let it proceed 
>> when it asked "confirm you have enough disc space" - I had ~750GB free on my 
>> 2TB drive which at the time seemed enough. Once it had started, it said 
>> "Importing 335,000 photos"!!! I don't recall there ever being that many, 
>> however, it was still Importing this morning with 225,000 to go but only 
>> 250GB space left. I think it will run out of space at that rate.Oh well, I 
>> am not so worried about that, at least I have now got a way to access them. 
>> I will get myself another 2TB drive and when I am home will start the 
>> process again. I am somewhat puzzled though that it is now apparently much 
>> larger than it was. Perhaps there is a compression that can be done or maybe 
>> this is all a consequence of the process of how I've got into this pickle.
>> 
>> Maybe there is still another method to properly unpick the library without 
>> resorting to an Import process. I am keen to hear if you or anyone else has 
>> encountered this and methods for unpicking the mess I've got myself into.
>> 
>> Regards
>> 
>> Pete.
>> 
>> 
>> 
>> 
>> 
>> ----- Original Message -----
>> From:
>> [email protected] <mailto:[email protected]>
>> To:
>> "[email protected] <mailto:[email protected]>" <[email protected] 
>> <mailto:[email protected]>>
>> Cc:
>> 
>> Sent:
>> Sun, 26 Apr 2015 17:53:44 +0800
>> Subject:
>> Re: iPhoto to Photos migration
>> 
>> 
>> Hi Peter,
>> 
>> I haven't got time tonight, but I will get back to your problem when 
>> possible.
>> 
>> Cheers,
>> Ronni
>> 
>> Sent from Ronni's iPad4
>> 
>> 
>> On 26 Apr 2015, at 4:20 pm, [email protected] 
>> <mailto:[email protected]> wrote:
>> 
>> Hi Ronni, yes I feel a real goose for the steps I took (in hindsight). 
>> 
>> As I work away (and am away from home for a further 2 odd weeks), I placed a 
>> copy of both (iPhoto and Photos) library files onto my 2TB external drive 
>> and using my Retina MBP to try and unpick this mess remotely from my Wifes 
>> MBP. A necessity as this happened the day prior to my departure. 
>> 
>> So i have the two files "iPhoto Library" and "Photos Library" both sitting 
>> within one folder on the external drive (each file is saying around 295GB 
>> from Get Info but not identical sizes). They are also still in place in the 
>> User>Photos folder on my Wife's MBP as I restored the iPhoto library from 
>> Trash using the "Put Back" command.
>> 
>> When I attempt to open the iPhoto library (using the Option key method on my 
>> Retina), it reflects as iPhoto Library.migratedphotolibrary Which would 
>> suggest that the library underwent the start of its transformation in 
>> readiness to be 'hard linked' with the Photos library. But the 
>> transformation was never completed.
>> 
>> I do not have a backup I can revert to at any stage prior to the update - 
>> coz I blew away the Sparesebundle!
>> 
>> Pete.
>> 
>> 
>> 
>> ----- Original Message -----
>> From:
>> [email protected] <mailto:[email protected]>
>> To:
>> "WAMUG" <[email protected] <mailto:[email protected]>>
>> Cc:
>> 
>> Sent:
>> Sun, 26 Apr 2015 15:38:45 +0800
>> Subject:
>> Re: iPhoto to Photos migration
>> 
>> 
>> Hello Peter,
>> 
>> Sounds like you have really messed up the transition/import of  iPhoto 
>> Library to Photos... and then did a Time Machine backup BEFORE testing 
>> everything was working correctly....
>> 
>> The first time you launch Photos, it searches your system for iPhoto and 
>> Aperture libraries. If only one library fits the bill, it imports that 
>> library. Otherwise, it opens the Choose Library dialog window  - Choose a 
>> library from the list, and Photos prepares the library for import.
>> 
>> Photos needs to prepare your iPhoto Library before it imports into a new 
>> Photos library.
>> When you import an iPhoto library into Photos, your existing library remains 
>> intact. The net result of the import is that you’ll have two separate 
>> libraries on your Mac’s drive: your old iPhoto library and a new Photos 
>> library 
>> 
>> The Import does NOT duplicate iPhoto Library but uses “Hard Links". Your 
>> iPhoto Library remains intact, BUT a new Photos Library comes into being.
>> The Libraries say they’re roughly the same size, but in fact, they’re 
>> 'sharing disk space' via ‘hard links’.
>> 
>> After the successful transition ‘Migration' from iPhoto to Photos you will 
>> have in your User > Pictures folder - 2 separate Libraries:
>>  "iPhoto Library.migratedphotolibrary” AND “Photos Library.photoslibrary"
>> 
>> On 25 Apr 2015, at 9:30 am, [email protected] 
>> <mailto:[email protected]> wrote:
>> 
>> Last week I updated my wife's 2012 MBP to latest OSX which brought the new 
>> Photos application. I had done my own 2014 Retina MBP previously without 
>> issue and have all my images carried over into Photos without a hitch
>> 
>> The issue with my Wife's machine is I did the update and am unable to see 
>> the images in Photos. I just get the intro screen with the 4 options for a 
>> new user. I've done the "Option" whilst starting it up and directed it to 
>> the new Photo Library file and still nothing. The Photo Library file shows 
>> in Get Info of 295GB so it would appear to be a file containing the picture 
>> and video files but how do I access it?
>> 
>> An issue potentially caused by me was that after the update,  I ran a 
>> cleaner (Cleanmymac) and it did some cleaning. I did in my travels after the 
>> cleaning notice in the Trash can was the old iPhoto Library!!! I assume this 
>> was an action of cleanmymac. So I selected "Put Back" and it in turn is now 
>> placed alongside the Photos Library in the default Apple folder location.
>> 
>> It was only after this that I opened Photos for the first time and I suspect 
>> that upon first opening, it runs a script which does the migration (but not 
>> duplication) of image files.
>> 
>> Oh goodness... Yes, that is correct. The first time Photos is opened (as 
>> I’ve mentioned above) the transition (Import from iPhoto) is run.
>> But you are saying your wife’s iPhoto Library was not in the correct 
>> location in Pictures... but was sitting in the Trash!
>> 
>> It gets worse - much worse I am afraid.
>> 
>> I don’t want to read anymore :(
>> 
>> During the update I turned Time Machine off to prevent unwanted backups 
>> during the process of updating. I think this is a recommended practice 
>> anyway. Well, after the dust settled (but before running Photos) I turned TM 
>> back on and it goes through the Preparing Backup routine for a looong while 
>> and then says Backing Up 325GB!!! I pressed the cross to stop that and 
>> thought about it a bit. Running low on TM disc space and having done this 
>> previously (and never once having had to call upon the TM backup to retrieve 
>> anything in the 6 years of Mac ownership) decided I would delete the 
>> Sparesebundle file and do a new Backup from scratch . I suspect that the 
>> Preparing Backup routine spotted the iPhoto Library in the Trash and the 
>> Photos library in its normal home and detected there are two libraries to 
>> back up hence the order of magnitude of the backup.
>> 
>> Anyway, now that I am over this, I still have the problem where neither 
>> iPhoto nor Photos will open showing my wifes previous images. 
>> 
>> When I launch iPhoto - I get a message "Aperture needs updating" so when I 
>> try that, it says the version of Aperture required is not available in the 
>> Australian Apple Store - so no good there
>> 
>> When I launch Photos - I get the first time user screen. If I select Albums, 
>> I see the greyed image of the previous Events folders as Albums and the 
>> names of Albums are accurate per the previous iPhotos Events folder, but 
>> upon opening, nothing is visible. Still no images.
>> 
>> Whilst in hindsight some of my actions have been not very good, I still 
>> don't understand why I can get at my images/videos?
>> 
>> Whilst in hindsight now ‘some’ but almost all your actions have not been 
>> good from what I can ascertain from your email :(
>> 
>> Anyone have any ideas how to get out of this pickle?
>> 
>> Let us now exactly what Library files you have in User > Pictures please -  
>> and also if you have a backup of your wife’s iPhoto Library BEFORE you did 
>> the Update to OS X 10.10.3?
>> 
>> Cheers,
>> Ronni
>> 
>> 17" MacBook Pro 2.3GHz Intel Quad-Core i7 
>> 2.3GHz / 16GB / 1TB 840 EVO SSD
>> 
>> OS X Yosemite 10.10.3
>> 
>> Pete :(
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