Mac Launcher wont start DW20

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cyberbat

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Jul 29, 2019
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Im getting an error while trying to launch DW20 pack. I am playing on a server using the Ultimate pack normally and everything works great. Tho I wanted to try to install one of the DW20 maps and check it out. I installed the ep. 50 map and tried to launch DW20 when I ran into this,

" [ERROR]ClassLoader.checkCerts:806->MinecraftLauncher.main:214 Unhandled error launching minecraft:
java.lang.SecurityExeception: class "md"s signer information does not match signer information of other classes in the same package "

Im running Mac OSX 10.7.5 and I only get this error with DW20. Thanks for helping out.

Cyberbat
 
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Ashzification

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Jul 29, 2019
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*warning: generic post*



Please follow these steps exactly: http://desk.feed-the-beast.com/index.php?/Knowledgebase/Article/View/9/0/basic-troubleshooting
This is to rule out any issues with your client setup.

If you continue to have trouble, please post your complete console log to pastebin.com and link your paste URL in this ticket.
If you are trying to show a screenshot, please share the image on an image hosting site (such as imgur.com).
Just like documents, I will not open picture attachments, for my system security.
 
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arjayx

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Jul 29, 2019
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Also having this problem.
MAC OSX 10.6.8

I think this is a mac problem.

Strangely enough, I was trying to use this yesterday, but instead of this error message, it was trying to download the Modpack, and after it downloaded i clicked Launch - but it told me i needed to download it again, and this never ending chain was going on forever. That has stopped today and now this. I would love for someone to help me out here. I can't get on my friends Minecraft Server.
 
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Ashzification

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Jul 29, 2019
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arjayx said:
Also having this problem.
MAC OSX 10.6.8

I think this is a mac problem.

Strangely enough, I was trying to use this yesterday, but instead of this error message, it was trying to download the Modpack, and after it downloaded i clicked Launch - but it told me i needed to download it again, and this never ending chain was going on forever. That has stopped today and now this. I would love for someone to help me out here. I can't get on my friends Minecraft Server.
Click to expand...

Did you do the basic troubleshooting?
 
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arjayx

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Jul 29, 2019
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Ashzification said:
Did you do the basic troubleshooting?
Click to expand...

Yeah, I'm planning to do that later on today - If if works I will write down how I did it incase other people in the future have this. Although I have no idea what happened to make it stop re-downloading that MOD. The only suggestion I have for that Is to close it, wait a day and try your luck again!
 
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Ashzification

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Jul 29, 2019
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arjayx said:
Yeah, I'm planning to do that later on today - If if works I will write down how I did it incase other people in the future have this. Although I have no idea what happened to make it stop re-downloading that MOD. The only suggestion I have for that Is to close it, wait a day and try your luck again!
Click to expand...

It's available on the Help Desk's knowledgebase, so it's always accessible :)
 
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