Actually I run the Electrum Mac osx Version. So I add two Ledgers to the Electrum multi sig wallet. Understood. Is there any compatible iOS App, this would come in handy?

Again, your help is highly appreciated!

First of all: THANK YOU! This was on point and very helpful.

May I kindly ask what setup matches my requirements?

Am using Nano Ledgers. Multisig for Bitcoin, ideally an app, a ledger plus a Mac OSX wallet. Can you recommend something, because all I know is CASA, but there must be an alternative?!

Good morning folks, I would like to up my security and did a little digging. Electrum seems to offer a good "base" for a 2 out of 3.

- Downloaded the latest 4.3.2 DMG from their website, checked the signature
- start the app, choose multisig
- choose 2of 3
- create new wallet (double check the 12 words seed...)
- the public general key is created and displayed
- I've scanned it with two different mobile iOS apps to add this to their multi sig wallet: both GREEN and BITPAY claim "assertion failure" and won't accept the key from electrum
- Doublechecked the resolution of the QR code. The apps read the code rightly. And yes, I've chosen the wright menu options on both apps (add xpub)
- GREEN: create multi sig wallet, add new account, choose 2of3, use a public key
- BITPAY: add account, Multisig, add to a shared wallet

=> To double down I've created another new multisig wallet on Electrum to be sure. Same procedure, same result.

Can someone please explain to me what I might be doing wrong?

Did you or did you not install Electrum on the Chromebook?
I own one myself...before I go through the hassle it'd be fantastic to know it'S gonna be successful.

Thanks