On macOS 10.10.5 (aka "Yosemite"), with Homebrew installed, after renaming /usr/local and /opt/local so they don't interfere, building Sage 8.2.rc2 succeeds.
However, trying to install jupyterlab via pip does not work: $ sage --pip install jupyterlab Collecting jupyterlab Could not fetch URL https://pypi.python.org/simple/jupyterlab/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:661) - skipping Could not find a version that satisfies the requirement jupyterlab (from versions: ) No matching distribution found for jupyterlab (while it worked fine with Sage 8.2.rc1). Does anyone else observe that too? -- You received this message because you are subscribed to the Google Groups "sage-release" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-release+unsubscr...@googlegroups.com. To post to this group, send email to email@example.com. Visit this group at https://groups.google.com/group/sage-release. For more options, visit https://groups.google.com/d/optout.