Monitors
Watch your Mac's CPU, GPU, memory, temperatures, network, disks, battery and fans live, and see which apps use the most of each.
Open it
Type monitors (or cpu, memory, battery, temperature, system monitor) and press ↵ on Monitors. You can also:
- click the line at the top of the Task Manager, or press ⌘M there;
- give it a hotkey on Settings → Monitors or Settings → Hotkeys.
Readings update only while Monitors is on screen. When you hide the bar or leave Monitors, Saiki stops reading them (unless an alert is on).
The readings
Each reading is a row with its current value, a line or two of detail, and a history graph beside it. Type to filter the rows by name.
| Row | What it shows |
|---|---|
| CPU | How busy the CPU is, with a bar, and how long the Mac has been up. |
| GPU | How busy the GPU is. |
| Memory | Memory used of the total, with a bar; memory pressure, compressed, cached and swap. |
| Temperatures | The hottest CPU and GPU sensors, and the battery's temperature. |
| Network | Download and upload speed now, and how much has moved this session. |
| Disks | Free space on each disk, its read and write speed, and its health (SMART status and life left) when the disk reports it. |
| Battery & Power | Charge and whether it's charging, with a bar; power the Mac and the adapter draw, the charger's wattage, battery health, cycle count and time left. On a Mac without a battery, the power it uses. |
| Fans | Each fan's speed in rpm. Only on Macs with fans; Saiki doesn't control them. |
What's using it
Press → or ↵ on CPU, GPU, Memory, Network, Disks or Battery & Power to list the apps using the most of it (up to eight), busiest first, each with its number. Battery & Power ranks them by energy. Press ← to fold the list again. Temperatures and Fans have no list.
Opening a row shows more too: CPU shows a bar for each core, performance and efficiency cores apart, and Network shows your Mac's local IP addresses.
On an app in the list:
- ↵ (Bring to Front) switches to it, for apps with a Dock icon.
- ⌘⌫ (Force Kill) ends it and all its processes. A card asks first: press ⌘↵ to go ahead or esc to cancel. Anything unsaved is lost. To quit an app gently instead, use End Task in the Task Manager.
Test your internet speed
Type speed test and press ↵ on Network Speed Test, or press ⌘T (Run Speed Test) in Monitors. Saiki runs macOS's own networkQuality test against Apple's servers, only when you ask. It can take up to a minute and a half.
The result shows under Network and in a message: download and upload speed, responsiveness under load (in round trips per minute, RPM) and idle latency in milliseconds.
More with ⌘K
| Action | Key |
|---|---|
| Show Top Processes / Hide Top Processes | ↵ |
| Bring to Front (on an app) | ↵ |
| Force Kill (on an app) | ⌘⌫ |
| Run Speed Test | ⌘T |
| Show Task Manager | ⌘M |
Alerts
Monitors can send a notification when something needs your attention. Every alert is off to start with. Turn them on in the Alerts card on Settings → Monitors; each has its limit just below it.
| Alert | When it notifies |
|---|---|
| High CPU | The CPU stays above the limit (70 to 100 %, 90 % to start) for 12 seconds. |
| Hot CPU | The CPU stays hotter than the limit (80 to 105 °C, 90 °C to start) for 12 seconds. |
| Memory pressure | Memory pressure turns critical. |
| Low disk space | A disk's free space drops under the limit (5 to 30 % free, 10 % to start). |
| Low battery | The battery drops to the level (5 to 50 %, 15 % to start) while it isn't charging. |
| Hot battery | The battery stays hotter than the limit (35 to 50 °C, 40 °C to start) for 12 seconds. |
Repeat an alert after (2, 5, 15 or 30 minutes; 15 to start) sends at most one notification per alert in that time, however long it lasts. The battery alerts appear only on a Mac with a battery.
While any alert is on, Saiki keeps reading what that alert needs in the background, even with the bar closed. Alerts need the Notifications permission (see Install and permissions).
Settings
On Settings → Monitors, the switch at the top turns Monitors off, along with Network Speed Test and its alerts. The Open card holds its hotkey.
| Setting | What it does |
|---|---|
| Refresh every | 1, 2 (the default) or 5 seconds, only while Monitors is open. |
| Temperatures in | °C or °F, in Monitors and its alerts. |
| Network speed in | MB/s, or Mbps as connection speeds are quoted. |
| Memory shows | Memory used, as Activity Monitor counts it, or only app memory. |
| History graphs | A graph beside each reading. |
| Graph scale | Labels each graph's top value on a dashed line. |
The Shown card has a switch for each reading: CPU, Each core's load, GPU, Memory, Temperatures, Network, Apps using the network, Local IP addresses, Disks, Battery and power, and Fans. All are on to start with. A reading that's off isn't read at all. With Apps using the network off, Network has no list of apps.