Hello, Bambook... if you read this thread, you will see that there are two different software that are called "Lightroom 3" and we can't help you until you specify which one you are talking about.

GoldingD

Legend

Follow-thru

Apparently I am wrong. A 64 bit version was included in LR 3, and can work on MAC OS Catalina

with some issues

https://helpx.adobe.com/lightroom-cc/kb/macos-catalina-compatibility.html

John Waller

Community Expert

>> A 64 bit version was included in LR 3, and can work on MAC OS Catalina

LR3 (catalog based, released in 2009) is 64 bit but the installer is 32 bit so LR3 cannot be installed, uninstalled or reinstalled on Catalina.

https://www.lightroomqueen.com/lightroom-macos-catalina-compatibility/

AFAIK, the only way to run catalog-based LR3 on Catalina is to have it already installed on Mojave or earlier then upgrade to Catalina.

GoldingD

Legend

Also, what MAC OS? If you are talking the very old 32 bit Lightroom v3 from back in 2009, and you are on MAC OS Catalina, then no, not going to work, ever.

Just Shoot Me

Legend

If you are asking about the Traditional version of LR, now called Lightroom Classic, you need to contact Adobe support, Chat, and ask them to send you a link to download Lightroom version 3.

Contact Customer Care

If you are asking about the Newer Cloud Centric version then you use the Creative Cloud Desktop App to download and install Creative Cloud programs.

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