Logic Pro X 10.5 update - "We could not complete your update"

2am and I'm glad I found this thread confirming my own problem. 2018 MBP running 10.14.8. All I want is Logic 10.5 on Mojave and I can't update any apps in the App Store or even download new ones. I get the same ""We could not complete your purchase. Cancelled"

I've unsuccessfully tried everything from:

• Every combination of signing in and out of App Store, iTunes, iCloud, restarting
• Trying to download an app with a new Account, and also in Safe Mode
• Support Chat with Apple, which was no help
• Dropping AppStore.app into AppCleaner and clearing the cache (https://discussions.apple.com/thread/8552241?page=23)
• Reinstalling MacOS
• Resetting PRAM
• Connecting to my mobile hotspot instead of my home WiFi

If I (or anyone else) ever figures this out, please post the solution.

I noticed the same issue today, but with 2 different applications. These are applications that I have updated frequently - but today I am receiving the:

"We could not complete your purchase. Cancelled"

I am not sure it is application specific now.

I have the same problem while trying to update to the newest Logic Pro X update. I THINK the SOLUTION is to update your operating system (OS) to Catalina (the newest update). Myself, I run my computer on Mojave, because I don't have the storage space to upgrade it to Catalina. I would guess that the new updates only apply to the newest operative system. You can check your operative system by clicking on the apple icon in your upper left corner - then clicking "About this mac" and under the Overview tab you can see your OS version.

For myself (and most others, I suspect) that isn’t an option because Catalina and Logic 10.5 are not playing nicely yet, based on user reports. So it defeats the purpose of going to 10.5 if it’s going to give us even bigger problems.

is everyone on WiFi? I might try connecting to Ethernet today and/or playing with my DNS settings.

For what it's worth, I'm still running Mojave and I was able to get my Logic Pro update, but I'm getting that error with a Microsoft Remote Desktop. Like some other folks here, I have some things to square away before I move to Catalina, so I hope this won't be happening with more important updates. I just thought I'd let you know that it's not just Logic. (Actually, that last line seems to be true of a lot of things these days.)

Ric

All - everything seems to be resolved for me. I had set the App Store for Automatic Updates in Preferences. I woke up this morning and Logic had updated on its own, and seems to be a success. Hoping it works for you all.

Also having this issue on 10.14.6. I cannot update, download previously purchased apps, or buy new ones.

I've tested another machine running macOS Catalina and everything is fine.

I'm having the same issue. "We could not complete your purchase." cancelled - Running Mojave. HELP! Tried lots of trouble shooting already.

Thanks for the update about your communication with Apple Customer Support.

I’m having the same issue. Nice to know that you’ve contacted the support absolut this! Please let us know if you hear something else or find a way to make it work. I will try via ethernet tomorrow.