Copy the entire installation package (which includes the extensions folder) onto a secure USB drive or a dedicated internal network share that the air-gapped machine can reach. Phase 2: Configuring the Local Installation Service
Ensure you have the main offline installer for your specific version of Altium Designer. Extensions are often version-specific.
Altium uses a "Local Installation Service" to mimic the cloud repository. You need to point your software to your local files instead of Altium’s servers. altium extension offline install
Click the button (the gear icon) in the top right corner.
If you can’t simply hit "update" within the software, here is the step-by-step guide to managing an Altium extension offline installation. Phase 1: Preparing the Offline Installation Files Copy the entire installation package (which includes the
Since your target machine has no internet access, you must first use a computer with an active connection to gather the necessary files.
Under the section, locate the Offline Installation option. Check the box for Use a local installation service . Altium uses a "Local Installation Service" to mimic
If the extension doesn't appear, verify that the offline package version matches your installed Altium Designer build (e.g., AD24 files won't work with AD23).
Go to (or click the user icon at the top right and select Extensions & Updates).