Yes, memsaver can be installed to and works on macOS 10. For more information see the Installation part of this documentation.

Keep in mind that Blender is not a real-time application! If you find your viewport lagging remember that you can always hide assets (or entire collections) in viewport, display them as bounds, etc.

If it is just you using memsaver, it does not matter how many computers you install the add-on on. However, if memsaver is used by multiple people, please purchase multiple licenses.

Updates of our addons are free, you only pay once. Updating procedure depends on which marketplace you used for your purchase.

BlenderMarket

Navigate to BlenderMarket and log in

Go to BlenderMarket Orders

Click on 'Go to Downloads' next to memsaver

Download the latest version

Remove the old version

Restart Blender: this is important because Blender might keep outdated files in cache!

Install the new version

Note:In case you lost the BlenderMarket receipt we cannot help you. Please contact BlenderMarket support to retrieve your account or lost order.

Gumroad

Navigate to Gumroad and log in

Go to the Gumroad Library

Click on memsaver

Download the latest version

Remove the old version

Restart Blender: this is important because Blender might keep outdated files in cache!

Install the new version

Note: In case you lost the Gumroad receipt or account we cannot help you. Please contact Gumroad support to retrieve your account or lost order.