My OEM Lightroom 5.2 system installs easily: Stated systems requirements for Mac include "Multicore Intel processor with 64-bit support", so it appears the linked "installed" (application manager) is the culprit, here.
Curious as to why my older iterantion CD includes a 64-bit installer, and the newer update installer does not...

johnrellis

Legend

Here are working download links (as of 9/5/2023). The web.archive.org links are very slow to respond:

5.7.1 Windows

http://download.adobe.com/pub/adobe/legacy/lightroom/win/5.x/Lightroom_5_LS11_win_5_7_1.exe

https://prodesigntools.com/lightroom-5-ddl-comparison-vs-lr4.html

https://web.archive.org/web/20150316160118/http://download.adobe.com/pub/adobe/lightroom/win/5.x/Lightroom_5_LS11_win_5_7_1.exe

5.7.1 Mac

https://trials.adobe.com/AdobeProducts/legacy/99CABBAC-C975-4A06-8D99-064C6871EE80/LTRM/5_7_1/osx10/Lightroom_5_CCM_LS11.dmg

https://prodesigntools.com/lightroom-5-ddl-comparison-vs-lr4.html

https://web.archive.org/web/20150316160118/http://download.adobe.com/pub/adobe/lightroom/mac/5.x/Lightroom_5_LS11_mac_5_7_1.dmg

I deleted the "ftp" links, which leading browsers no longer support by default.

R

ResqDogz

Participating Frequently

John;

Many thanks for your efforts, but accessing 5.7.1 Mac launches:
https://trials.adobe.com/AdobeProducts/legacy/99CABBAC-C975-4A06-8D99-064C6871EE80/LTRM/5_7_1/osx10/Lightroom_5_CCM_LS11.dmg

And - despite downloading and installing - when attempting to launch, returns these identical error messages:

It seems Adobe has removed all "trial version" access for this legacy software - at least, on the Mac side?

R

ResqDogz

Participating Frequently

Oops, I see you mentioned 10.13.6, which should run 32-bit installers just fine.

My only suggestion is to run the Adobe Creative Cloud Cleaner tool to remove all traces of Adobe software and then re-run the 5.7.1 installer.

Thanks, John - but I'm a bit hesitant to "erase" my Photoshop CS6 and Acrobat Pro programs (licensed and registered), for fear that'll screw up reinstalling those programs, as well.

I'll just have to keep PS/CS6 and Lightroom 5.2 on this High Sierra start-up drive, and migrate everything else to another...

Just "bit the bullet" and - RELUCTANTLY - subscribed to Adobe's Photography plan (20G, Photoshop/Lightroom Classics/Lightroom CC) for 12 months, with an additional 3 months free as a courtesy).

Now, I have to restart my iMac from either the Catalina or Big Sur drives, in order to download and utilize those programs, as High Sierra isn't capable of running them... sigh....

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