Photos Open Two Libraries Simultaneously

I've managed to have multiple users on the same Mac access the same photo library on my NAS. There are multiple posts saying that storing the photo library on a non-HFS partition is a bad idea but I never had an issue with my Synology NAS (formatted ext4), this applies to iphoto and photos library. Viewing multiple photos at once on Mac is simple. We all know that you can open and view multiple photos by Preview, a free and versatile image viewer on Mac. Highlight all image files and double click on one of them. Preview will open these images at once with thumbnails view in the sidebar. Complete the given below directions to open up multiple folders at once in Windows 10/8/7. Step 1: Open up the Notepad program. Step 2: Type @echo off at the beginning, as shown in the picture below. Step 3: Now, at the beginning of each line type, start, leave a space, and then type or paste the path to folders that you want to simultaneously. Two of the libraries also represent the up and coming Julia language, custom-tailored for both speed and productivity. So read on to learn more about these interesting open source libraries that haven’t quite broken into the mainstream yet. The 7 Best Open Source AI Libraries: #7 DiffEqFlux.jl: Neural Differential Equations in Julia Language.

Simultaneously

I have a migrated photos library that is 800GB. It is overwhelming and needs to be split by photo creation date if that is possible...

In that case I would

  • Make a backup of your library before you start the splitting.
  • First create two smart albums (File > New smart album) in your large Photos Library.
    • One smart album named 'Early photos' with a smart rule 'date is before <the split date>'
    • One smart album named 'Recent photos' with a smart rule 'date is after <the split date>'
  • Now create a duplicate library on an external drive. The file system of the drive should be MacOS Extended (Journaled)
    • Delete the photos from the 'Early photos' smart album from the first library
    • Delete the photos from the 'Recent photos' smart album from the copied library

This way you will have the photos separated by date in both libraries.

Now you can save the second library back to the drive where you are keeping your libraries.

Apr 22, 2017 10:49 AM

For the casual photographer, Apple’s iCloud Photo Stream service offers great convenience, bringing, as Apple puts it, your photos “everywhere you want them.” And the marketing slogan, within limits, is more or less true.

For example, I recently went on a two-week vacation to Great Britain and brought along with me my old Canon PowerShot SD800, my iPhone 4, an iPad 2, and the Apple Camera Connection Kit. Each day, I would go out, take some pictures with my iPhone (usually to obtain GPS information for a particular location) and others with my Canon, and then, later, import the Canon pictures to my iPad with the connection kit. I had no need to import my iPhone pictures, though; as soon as my iPhone was within range of the Wi-Fi network in the flat where I was staying, the day’s iPhone pictures began arriving on my iPad as well. With very little effort on my part, my iPad became the portable
photo library for all of my vacation photos.

And when I got home and fired up iPhoto on my iMac, all of those vacation pictures — both the ones from my iPhone and those I imported onto the iPad from my Canon — were all there in the Photo Stream in iPhoto, ready to be divvied up into various vacation picture albums. Photo Stream, in my experience, was working exactly as described, supplying me with my photos everywhere I wanted them.

But, it turns out that “everywhere you want them” is not necessarily true for everyone. A few days after I got back I was forwarded an email from a Take Control reader who said that, in his experience, Photo Stream did not work between multiple Macs. This baffled us at TidBITS since we had not seen that to be the case. So, naturally, we began some experimenting to find out why Photo Stream was failing for our correspondent.

What Did Work — The first experiment was a simple one. With iPhoto in one user account on my iMac already connected to my Photo Stream, I logged in to a second user account on my iMac (I always keep a second user account on my iMac available for testing and troubleshooting purposes), launched iPhoto in that account, and set it up to use my iCloud Photo Stream as well. That worked fine: the photos in my iCloud Photo Stream began downloading to the iPhoto library in my second iMac user account, even though iPhoto in my primary iMac user account was open and connected to that same stream. No error messages were seen.

Photos open two libraries simultaneously without

So, one Mac and one Photo Stream had no problem with two different iPhoto libraries in two different Mac OS X user accounts.

The next experiment was run by Tonya Engst. She had an iPhoto library on her MacBook that she had just migrated, via Migration Assistant, to her new MacBook Air. Both MacBooks used the same user account name, and both iPhoto libraries were identical. She then proceeded to enable Photo Stream on both her MacBook and her MacBook Air, and, like me, had no problem. Even though both libraries had the same name, and were running in Mac OS X user accounts that also had the same name, iCloud was able to tell them apart and supply her Photo Stream to each of them.

So, two Macs, and two identical iPhoto libraries on two identically named Mac OS X user accounts had no problem with simultaneously connecting to the same stream.

What Didn’t Work — My next experiment was to switch libraries in iPhoto after I had enabled Photo Stream. To do that, with my Photo Stream still connected to the iPhoto library I normally use, I quit iPhoto, and then relaunched it with the Option key held down. Doing that prompts iPhoto to ask you to choose an iPhoto library to open; it’s how you switch between iPhoto libraries if you happen to have more than one. I chose a test library I had created a while ago, and then, finally, I saw an error message much like one that our correspondent had seen.


Photos Open Two Libraries Simultaneously Using

So, here was the restriction: in any one Mac user account, iPhoto can only connect an iCloud Photo Stream to one iPhoto library at a time. You can’t have two iPhoto libraries in the same Mac user account connected to the same stream.

Photos Open Two Libraries Simultaneously Online

But this restriction was not, it seemed, what was affecting our correspondent: he was running iPhoto on two different Macs, using two different iPhoto libraries, but he saw the same message. What was going on?

Using

What Was Going On — After a couple more email exchanges, we got a full picture of how our correspondent’s experience differed from ours. Here’s what he had done.

Photos Open Two Libraries Simultaneously Free

He first set up iPhoto to connect his Photo Stream to his iPhoto library. He then copied that library to a different Mac. He then launched iPhoto on that second Mac to see if the copied library was intact. It was. Finally, he enabled his iCloud Photo Stream on that second Mac and that was when he got the multiple library error message.

While we’re still not quite sure what is going on under the hood with Photo Stream and his library, it seems reasonably clear that copying a library that is still connected to Photo Stream to a different Mac and then trying to connect that copy to the same stream can confuse iCloud.

Two

The Moral of the Story? — If you want to copy your iPhoto library to another Mac, or to another user account on the same Mac, disconnect it from your Photo Stream first. Although Photo Stream can connect to multiple Macs, it gets confused when you move an already-connected iPhoto library among Macs.

Or, as Dr. Egon Spengler succinctly put it in Ghostbusters, “Don’t cross the streams.”