... ansonsten muss ich auch passen...

To find the original item for an alias : choose file > right click over the file > show original or can use press command + R .
To remove an alias : select the alias file ,press command + info , it will prompt to enter the admin name & password select the inside files & delete , now the alias file is empty , again right click on the file & move to trash .
Restart the machine & empty the trash .