The MiSeq v3.0 software updater has been temporarily removed from the web. Contact Illumina Tech Support for more information.
For full installation instructions, see the installation notes included with the updater download package. The most recent update still uses Reference Genome v188.8.131.52 for MiSeq and there is no need to update the reference genome.
Note: The software updater can also be installed in the RUO drive of MiSeqDx instruments with dual boot configuration. If you are not sure if your instrument has dual boot configuration, contact Illumina Tech Support.