It should be more easily discoverable, but command-shift-g lets you type in the path directly, and even has tab completion. If you want to navigate visually, navigate up to the computer or drive where you want to start, then press command-shift-period in order to see all of the directories that are usually hidden.
Both of these approaches work in the open and save dialogs, and not just the Finder.
This is outside the context the "Open File" dialog from your original question, but here's another tip about "navigating up":
In many application windows you can navigate the hierarchical directory structure that contains the currently open file by right-clicking on the document name/icon in the window's title bar.
E.g. in Preview, Pages, Finder, ..., hover over the file or directory name in the window's title bar. If you right click on it, a pop-out will appear with a vertical hierarchical list of that file's parent folders. Selecting one of the parent folders will open a new Finder window at that location, allowing you to quickly navigate to a file's containing folder.
And some additions to the tips in other comments:
- Dragging a file or directory from finder to the terminal will paste its path onto your shell
- iTerm has Finder integrations. Right click on a folder in Finder, Services -> New iTerm2 Window Here
And you might enjoy some of these Finder tweaks from my "dotfiles" (just run them on the shell):
# Set Documents as the default location for new Finder windows
# For other paths, use `PfLo` and `file:///full/path/here/`
defaults write com.apple.finder NewWindowTarget -string "PfDo"
defaults write com.apple.finder NewWindowTargetPath -string "file://${HOME}/Documents/"
# Finder: show hidden files by default
defaults write com.apple.finder AppleShowAllFiles -bool true
# Finder: show all filename extensions
defaults write NSGlobalDomain AppleShowAllExtensions -bool true
# Finder: show status bar
defaults write com.apple.finder ShowStatusBar -bool true
# Finder: show path bar
defaults write com.apple.finder ShowPathbar -bool true
# Keep folders on top when sorting by name
defaults write com.apple.finder _FXSortFoldersFirst -bool true
# Enable spring loading for directories
defaults write NSGlobalDomain com.apple.springing.enabled -bool true
# Use list view in all Finder windows by default
# Four-letter codes for the other view modes: `icnv`, `clmv`, `glyv`
defaults write com.apple.finder FXPreferredViewStyle -string "Nlsv"
# Show the ~/Library folder
chflags nohidden ~/Library && xattr -p com.apple.FinderInfo ~/Library 2>/dev/null && xattr -d com.apple.FinderInfo ~/Library
# Show the /Volumes folder
sudo chflags nohidden /Volumes
# Expand the following File Info panes:
# “General”, “Open with”, and “Sharing & Permissions”
defaults write com.apple.finder FXInfoPanesExpanded -dict \
General -bool true \
OpenWith -bool true \
Privileges -bool true
Thank you for the cmd-shift-g tip. That will save me a lot of grief.
Re your second tip: how do you navigate up? I couldn’t see an obvious way to do that, either.