I just realised that I cannot copy my Macbook Catalina Photos libraries to my High Sierra iMac and open them with Photos 3. The only solution I found here was to use iCloud as some sort of intermediary between Photos 3 and photos 4. Frankly that's unacceptable. Not everybody is sitting in Cupertino with gigabit broadband. The correct thing to do would have been to keep the libraries compatible or to add a feature to Photos 3 to read the new format - it couldn't have been very difficult.

I've been a programmer, manager and executive in the IT industry since 1976 and I'm disappointed with Apple's support for people running earlier releases of Mac OS on some of their devices. Much as I dislike Microsoft they do offer backward compatibility, as does IBM...... since 1964.


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the App may use new features of the OS and not be able to run on previous versions but old versions of the App should run on new versions of the OS, including their file access method. That's backward compatibility.

On this we will disagree I'm sure, but no developer of anything in the computer world promises forwards compatibility which is what you're describing. Backwards compatibility means that Newer versions of an app can (and here's a hint for you) look backwards to older versions and read the data. That way, older data is not trapped by updates. So, never versions of Word can read older .doc files, but older versions of Word cannot read .docx files.

as a general indication of the state of your knowledge and experience in the area. That and your apparent inability to even use a search engine tells us enough to allow us to evaluate everything else you have to say.

Photos is heavily tied into the OS, it seems to be a wrapper around various system routines. If those change, Photos has to change with it, and the routines are no longer there to support older versions of the database.

Nope, Photos is not backwards compatible. That is one of the problems with it being so tied into the operating system. Photos is really designed as a single-user on one computer easy-to-use free solution. Once you get outside of those boundaries, it is not the right tool and you should look for other solutions.

Thanks Keith, I've no problem paying for good software - I made a living out of it for long enough - but if Photos is just a cheap (free even) single user, single machine product then it sould be promoted as such, not as the photo management solution it's not. Plus it's integration into iCloud makes it hard to reject. Much as I love Apple products, this one hasn't been thought through properly.

None of Apple's Photo applications has ever been backward compatible, not even Aperture, Apple's professional photo software. Photos 5 can open any photo library from Photos 1 to Photo 5, even every Aperture library, and iPhoto 8.xx or 9.xx.

But Photos 3 has no way to understand the changes to the Photo Library introduced by Photos 5. Apple would have to release an update for all oder system version, so the older Photos.apps can read the new databases.

if you look at the package contents of the new Photos 5 libraries, you will notice dramatic changes. There is no longer a Masters folder with the original image files stored unmodified, in nice subfolders names by the date of import. All original image files have been renamed with cryptic hexadecimal numbers and are stored in 16 subfolders, unrelated to the date of import. Photos 3 is expecting the old format of the library.

I am sharing my Photos Library with iCloud Photos and can use it without problems on my Macs with Mojave, my Catalina Mac, and even a Mac with the Beta version of Big Sur, as well as on an iPhone and an iPad Pro MAx. The Network is not really a problem, because I am not using the "Optimise Mac Storage" option. All files are mirrored locally, and only edited versions have to be updated with iCloud. iCloud id seamlessly syncing between the devices with different system versions. A poor network connection would only be a problem, if you need to fallback on "Optimise storage".

It is funny, but I never fully appreciated the benefits of an app that is not a part of the system and is not updated with each system version. It has been much easier to share a photo library across platforms with different system versions, if the photo application is compatible with more than one system version.

Sorry, TD. What a blunder. ? I meant to discuss "forward compatibility" of Aperture and iPhoto. Don't know, what made me write "backward". Just to point out that not even the professional flagship Aperture could open Aperture 3.2 libraries in Aperture 3.1 or similar.

I don't particularly care what the new Photos library index and file format is, it should have taken into account the existence of earlier version of Photos. It wouldn't take a competent coder any time to write an subroutine to access the new format but Apple didn't bother. Only a charlatan would think they can start with a blank page for each release. Furthermore you obviously have no idea how poor the internet speeds the vast majority of the World has to cope with. Uploading gigs and gigs of data is not an option for millions of people. Copying a library from one device to another is.

Really Terry, a new version of an application modifies its DB so it can't be read by an ealier version, on, for example of shared drive? No Son, you don't understand backwards compatabiluty. But that doesn't matter. What matters is the Photos development team didn't care - IMO that's poor development and poor customer service, no matter what anybody says. And as somebody posted above, I suspect a product you paid for wouldn't have dumped it's users in such a manner. This is arrogance dressed up as progress. A small update to earlier versions could have fixed the issue. It's not rocket science.

Answer my simple question, do you not think is a fair requirement to be able to use a large photos library on an external drive on multiple machines running different releases of an operating system? I do. What's more I think adding in support for the Photos 4 file structure etc. would have been a relatively trivial and inexpensive exercise.

"This issue does not come up all that often"...... Yes Keith, I can imaging that. Single users on single machines won't worry about it and professional users will just replace their H/W to run the latest OS version. It's the inbetweenies like me that are affected. A pity. Nevertheless, IMO tying an application so closely to a OS version is bad design and rather disappointing. It's the opposite of what best practice would call for.

I had ongoing difficulties with my old iMac (mid 2007), so I did a Recovery OS install of El Capitan onto an empty drive. But, my Photos is version 1.5 and it was stuck during downloading/uploading to iCloud. That's when I discovered Photos is version 1.5 Is 1.5 the latest for El Capitan ???!

A HINT OF WHAT'S WEIRD BEHIND THE SCENES IS: Photos will read Uploading ... items. (1.62 GB of ... GB) That first number will rise up but fallback to the earlier lower number, then rise up and remain stable at the higher number.

When it really got on a roll, no other Internet services were available!! Not the Apple Store; Not other devices attempting to use my WiFi SSID. And, performance monitoring was PINNED at very large CPI for VTDecoderXPCService and likewise for VTEncorderXPCService. That's why I eventually punted my installation.

Whenever you repair aPhotos Library, it will result in a new upload to iCloud. The repaired library may be different from the original library, because of the fixed items, and so Photos will upload it it merge it into the existing Photos Library and compare it. While Photos is merging the two libraries the number of photos that need uploading will change continually. That is normal. I would not interrupt the upload process. Any interruption like signing out of iCloud or repairing the library will just result in a new upload from the beginning.

You can export your photos in their current rotation out of Photos before you import them into Tropy. In other words, if you export photos to, say, your desktop, and then bring the desktop version into Tropy, your file names should be retained. The drawback to this approach is that Tropy is now connected to the desktop version, not your Photos version, so you now have two copies of the same photos.

Photos is part of the operating system. The version of Photos you have depends on the version of macOS you have. So the only way to get a newer version of Photos is to upgrade past El Capitan to a newer version of macOS.

Since you are using such an old version of macOS and Photos, the built-in service to print a book won't work. Apple discontinued their service years ago. If you have the current version of macOS and Photos then you would need to get an extension for ordering books and such. Apple doesn't do it anymore.

An alternative that you can do whether you upgrade or not, is to use a regular web service for printing books. You can't use the book you created, you'll need to use the service's web pages to do it, but there are plenty of such sites out there. 152ee80cbc

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