Install KOSMA on a MacFirst StepsYou can install KOSMA on your Mac and start it.You need a Mac with an Apple chip, macOS 12 or later and a KOSMA account. If you do not have an account yet, see [create your KOSMA account](/kb/article/create-your-kosma-account). On a Windows PC, see [install KOSMA on Windows](/kb/article/install-kosma-on-windows).1. Download the installerOpen [kosma.io/download](https://kosma.io/download) and click **Download for Mac**. Your browser saves the file `KOSMA-installer.pkg`, usually in your Downloads folder.2. Install KOSMADouble-click `KOSMA-installer.pkg`. Accept the licence agreement. If macOS asks for a password, enter the password of an administrator of this Mac.3. Start KOSMA and sign inOpen your Applications folder and double-click **KOSMA 3**. Click **Sign in with browser**. The next steps are in [log in to KOSMA](/kb/article/log-in-to-kosma).If you want to use KOSMA on a second computerInstall KOSMA on the second computer and sign in with the same account. You do not need to copy any files. The projects you have uploaded to the server are available there too. To learn how KOSMA saves your projects, see [how your work is saved and synced](/kb/article/how-your-work-is-saved-and-synced).When you sign in on the second computer, KOSMA ends the session on the first. You do not lose any data.Markdown