Pier is a featherweight monitor that lives in your menu bar. See what's listening on every port, which process is hogging the CPU, and your system's vitals — then act on them in one click.
Flip between four panels from the menu bar. Look, understand, and act — without ever opening a terminal.
Every TCP & UDP port, the owning process and its app icon, the bound address, and an IPv4·IPv6 tag. A glance tells you what's exposed to the network — and one click ends it.
Top processes ranked live by CPU or memory, with instant name search that goes beyond the Top N cap — find the background app that's been hiding past the cutoff. Expand any row for the full command line, path, and parent; then end or force-quit it.
CPU, memory, swap, disk, and live network throughput in one tidy panel. Pin any combination of CPU, memory, and network rates right next to the menu-bar icon — pick what you care about, leave the window closed.
Start, stop, and restart your Docker / Podman containers and Homebrew services straight from the menu bar. Pier even detects when your docker is really Podman.
Type a name — Pier finds it even if it's a sleepy background app buried past the Top N cutoff. Pair it with the new configurable Top N (10–500, or show all) in Preferences.
Sequoia quietly tightened lsof's access to root-owned sockets, hiding launchd / system daemons / privileged ports. Pier now combines lsof + netstat so the port list stays whole — every listening socket, regardless of owner.
Dev tab no longer hangs when Docker's daemon is off (6s hard timeout). First launch never asks for keychain access during the free-promo period. Just opens clean.
Universal build · macOS 14+ · Apple Silicon & Intel
Pier needs to see every process and act on it — listing ports, reading other processes, ending them. The App Store sandbox forbids that. So Pier is distributed directly, signed with a Developer ID and notarized by Apple, so Gatekeeper trusts it.
Your monitoring data never does — ports, processes, and system stats are read on-device and never uploaded. Pier itself goes online only to check for updates (you can turn that off) and to activate and periodically verify your license. No third-party analytics or ad trackers.
It's built in native SwiftUI and samples only while a panel is open or a menu-bar readout is enabled. Idle CPU rounds to zero — a resource monitor shouldn't be a resource hog.
macOS 14 (Sonoma) and later, on both Apple Silicon and Intel.
You can end any process you own. System processes (owned by root) are flagged and guarded with a confirmation — and ending a launchd-managed daemon will just respawn it, which Pier tells you up front.