OR, download DSpace 9.0-rc1 [to be released on Friday, April 4 2025] and install it locally (or test an upgrade)
OR, use Docker to quickly install DSpace 9 locally (see Try out DSpace 9)
DSpace 9.0 Documentation is available at: DSpace 9.x Documentation (Documentation feedback is also welcome! Contact Tim Donohue if you'd like to help us enhance our 9.0 documentation!)