Open up electrum. Go to File > New/Restore. Give the wallet a name and Click OK. Then choose the option for "Restore a wallet" and just follow the rest of the instructions in the wizard.
thanks for you ansswer, the problems is on my wallet I just have the following options : history/send/receive/contacts/console
I checked many threads but could not find the answer i am looking for. So I lost my the password of my electrum wallet, but i still have the 12 word seed. I use the last version of mac osx.
Online the guide to restore the wallet says that i can do it via the file command on the wallet, but I don't any file command on my wallet.