sudo port install htop
Password:
--->  Computing dependencies for htop
--->  Fetching htop
--->  Verifying checksum(s) for htop
--->  Extracting htop
--->  Configuring htop
--->  Building htop
--->  Staging htop into destroot
--->  Installing htop @0.8.3_1
--->  Activating htop @0.8.3_1
--->  Cleaning htop