specs

#!/usr/bin/env bash
# Print a summary of this Mac's hardware, OS and disk.
set -euo pipefail

bytes_to_gb() { echo "$(( $1 / 1024 / 1024 / 1024 )) GB"; }

row() { printf '  %-14s %s\n' "$1" "$2"; }

echo
echo "Hardware"
row "Model"   "$(sysctl -n hw.model)"
row "Chip"    "$(sysctl -n machdep.cpu.brand_string)"

total_cores=$(sysctl -n hw.ncpu)
if performance=$(sysctl -n hw.perflevel0.physicalcpu 2>/dev/null); then
  efficiency=$(sysctl -n hw.perflevel1.physicalcpu 2>/dev/null || echo 0)
  row "Cores" "$total_cores ($performance performance + $efficiency efficiency)"
else
  row "Cores" "$total_cores"
fi

row "Memory"  "$(bytes_to_gb "$(sysctl -n hw.memsize)")"
row "GPU"     "$(system_profiler SPDisplaysDataType 2>/dev/null | awk -F': ' '/Chipset Model/ {print $2; exit}')"

echo
echo "System"
row "OS"        "$(sw_vers -productName) $(sw_vers -productVersion) ($(sw_vers -buildVersion))"
row "Kernel"    "$(uname -sr)"
row "Arch"      "$(uname -m)"
row "Uptime"    "$(uptime | sed -E 's/^ *[0-9:]+ +up +//; s/,? +[0-9]+ users?.*//')"
row "Hostname"  "$(scutil --get ComputerName 2>/dev/null || hostname)"

echo
echo "Storage"
df -h / /System/Volumes/Data 2>/dev/null | awk 'NR>1 {printf "  %-22s %s free of %s (%s used)\n", $9, $4, $2, $5}'

echo
echo "Battery"
pmset -g batt 2>/dev/null | awk -F'\t' 'NR==2 {print "  " $2}' | sed -E 's/ ?present: true//; s/;/ ·/g' || echo "  n/a"

echo