"Unsupported Library" cannot open my photos stored on an external drive

Started 2 months ago | Discussions thread
OP RSSrsvp Veteran Member • Posts: 3,235
Re: "Unsupported Library" cannot open my photos stored on an external drive

Mike Boreham wrote:

RSSrsvp wrote:

RSSrsvp wrote:

terrydev wrote:

The problem here is that your Photos library was upgraded to a v5 library when you went to Catalina. Photos on Mojave is a v4 and the earlier app can't ope the later libraries structure.

I'm sure you had a back up before upgrading from HS, so simply replace the Photos library with the back up and upgrade to v4.

Thanks, I am following your recommendation and replacing the Photos library from the last Time Machine backup done before I upgraded to Catalina right now. I am crossing my fingers that it works.

Update: it was not successful. This is the message I am seeing when attempting to open up the Photos app that I just replaced.

Is that a typo...that you replaced the “Photos app”....you need to restore the Photos library from your TM backup, not the app.

Sorry, I meant Photos Library, not the app.

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