Frame.io 2.6.1 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The software lies within Productivity Tools, more precisely Cloud Services. This free Mac application was originally designed by Frame.io, Inc.
From the developer:
Frame.io lets you upload your Final Cut Pro X media to its cloud-based collaboration platform to share projects or clips with your team, anywhere in the world. Just use the Frame.io share destination from the Share menu directly within Final Cut Pro X.
You may want to check out more software for Mac, such as Proto.io, Frame King or Photo Frame, which might be similar to Frame.io.
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