Problem FTB launcher not downloading modpacks on Mac OS

[pickle77]

System: Mac OS Catalina 10.15.6 (19G73)
Java version: Java 8 Update 261

Issue:
I downloaded the newest FTBapp from the feed-the-beast website. But whenever I try to install a mod pack, it is always stuck on the "Installing Vanilla Launcher" or "Creating Environment" step. By the way, I have vanilla Minecraft launcher installed on my laptop and it runs perfectly fine.

Strangely enough, restarting the FTBapp shows that the mod pack I tried to download has been successfully added to My Modpacks, even though I cannot open it. If I go to the instance folder there is only an image of the mod pack cover and a text document.

I have tried this with several modpacks and I have reinstalled the FTBapp several times. It does not solve the problem.

 

[random850]

Exact same thing is happening with me on Windows 10, looking at other threads it seems like it might be an issue with the latest update to the launcher

 

[Chiimerae]

Same for me. got it working on windows but osx gets stuck in "Creating Environment". This message updates to a stuck "Installing Vanilla Launcher" after 1 navigation click.

Closing the installer and reopening. Most of the time I can restart the download. Sometimes it 'thinks' the modpack is installed, but won't launch it. Deleting and reinstalling results in the same lock.

 

[Tasukete_7]

i have the exact same problem on Mac OS Catalina 10.15.7

 

[ffossip]

same here and it's been months since this was posted, guess there's no solution yet?

Mac OS Catalina 10.15.6 for me

 

[Tasukete_7]

I haven't really solved the problem, but I downloaded an older version of the FTB Launcher and I can download modpacks normally there.