I have recently upgraded to mountain lion and every time I start a new tmux session, I get the following warning:
│warning: unsupported new OS, trying as if it were 10.6-10.7
Is this anything I should be worried about?
MacOS – tmux on mountain lion
macos
Related Solutions
First, you said you are on 10.7. Have you run the updaters to update your system to 10.7.3, with all of Apple's updates and patches?
Most likely you are dealing with duplicate fonts that are incompatible--old ones from your old system and newer versions of the fonts with the same names that came with 10.7.
Here are some things you can try:
- Run the Font Book application, selected all the fonts, and run "Look for Enabled Duplicates" and disable the duplicates. Then select all fonts, run "Validate Fonts", and remove any that are reported as corrupt.
- Use a utility like Cocktail to delete all your font caches, repair your disk permissions, and reboot. (There are several other programs that provide you with a way to delete your font caches, and there is also a method to do this via Terminal and the command line).
- Download the free TinkerTool and see what it reports about your system font settings. See if you can use TinkerTool to reset the font settings to their system defaults.
If none of the above work, or if you learn from Font Book that the basic fonts that you need are corrupt, then you should re-install 10.7.3 on your existing system (this will not hurt your data) and run Software Update and apply all patches. But first you need to delete any duplicate fonts or corrupt fonts.
I believe you can download the Lion 10.7.3 installer from the Mac App Store onto your existing installation and run the re-installation procedure from there.
The Time Machine backup should do a pretty good job keeping all of your documents and most of your settings and should be backwards-compatible*, but I recommend making a complete, bootable backup of your previous system so that you're guaranteed to be able to restore your machine to exactly as it was before updating.
I'm a fan of Carbon Copy Cloner (free trial) for making the backup. Back up to a clean disk or partition using CCC and tell it to copy everything. It will also help you clone your Lion Recovery HD onto the backup disk.
Once the backup is done be sure to try booting from it to make sure everything worked.
*Should be, but I haven't personally tested.
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Best Answer
That message comes from my
reattach-to-user-namespacewrapper program that let’s you (e.g.) access the pasteboard inside tmux. You are using an old version of the wrapper (from prior to Mountain Lion).The old wrapper does work correctly under 10.8; the message just means that you are using a version from before 10.8 was available/verified. So there is nothing to worry about, but it may get annoying seeing the message every time you start a new tmux pane/window.
To get rid of the message, you should upgrade to a newer version of the wrapper. If you previously installed via MacPorts of Homebrew, just upgrade via that package manager. Otherwise, download the latest tagged source (or pull into your previous Git clone), rebuild it (e.g. type
make), and copy it to the location that your tmuxdefault-commandsetting uses.Both MacPorts and Homebrew currently package the 1.1 version, which suppresses the message when running on Mountain Lion. The 2.0 version also includes the program’s name in such messages so that the source of any future messages will be more obvious.