[FIX] Client Won't Open on Mac, pop's up for second then closes.

FreshlyFinessed·Mar 14, 2015·6 votes·14,925 views

While I was playing a custom game my client crashed, when I tried to re-open it the client would attempt to open but fail without an error message or even opening a shell for the client. I was on PBE client when this happened; however, this effected bothy regular and PBE client.

To fix this problem: Re-download the .dmg file directly from riot's website. Copy the League of Legends.app out of the .dmg file into your applications (don't delete old .app, keep both). Right click League of Legends 2.app and click show package contents. Go to contents > LoL > RADS > System. Copy UserKernal.app. Replace the UserKernal.app in the same directory of your broken League of Legends.app. Your client should now open properly!

Good Luck and see you on the rift! -Havok

14 Comments

inposibrewJun 18, 20153 votes

this did not work for me i tried to reinstall the client. first time installing on this mac when i click the app to open it the lol icon pops up then disappears and nothing happens.

SwordStance24Jun 29, 20155 votes

Did you fix this? Same problem!

TheUbnubMar 18, 20152 votes

where is this dmg file

AKuaticSep 20, 20152 votes

I'm having the same problem. when i reinstall it nothing changes either. so now I'm not able to play.

InkFrostDec 20, 20152 votes

I have had the same problem, and I have tried reinstalling several times. At this point League wont even open on my Mac, the Launcher Just bounces on my doc for a few seconds and disappears.