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# macOS Support for Loadbars
## What was implemented
Loadbars now fully supports macOS with automatic window activation built into the binary.
### Changes made:
1. **Script embedding** - Both Linux and Darwin monitoring scripts are embedded in the binary
2. **OS detection** - Automatically uses the correct script based on the host:
- `localhost` on macOS → Darwin script (sysctl, vm_stat, netstat, iostat)
- `localhost` on Linux → Linux script (/proc filesystem)
- All remote hosts → Linux script (assumes remote servers are Linux)
3. **Window activation** - macOS-specific code automatically brings SDL window to foreground
- Uses build tags (`activate_darwin.go` and `activate.go`)
- No external helper script needed
## Usage on macOS
Simply run the binary directly:
```bash
# Monitor localhost
./loadbars --showcores --showmem --shownet
# Monitor remote Linux servers
./loadbars server1.example.com server2.example.com --showcores
# Monitor both localhost and remotes
./loadbars localhost server1.example.com server2.example.com --showcores
```
The window will automatically appear in the foreground.
## Building on macOS
Requirements:
```bash
brew install sdl2
```
Build:
```bash
mage build
# or
go build -o loadbars ./cmd/loadbars
```
## Technical details
### Script selection logic
- `internal/collector/script.go` - Embeds both scripts
- `internal/collector/collector.go` - Selects script based on host:
- For localhost: checks if `/proc` exists to determine Linux vs macOS
- For remote hosts: always uses Linux script
### Window activation
- `internal/display/activate_darwin.go` - macOS-specific activation using `open -a`
- `internal/display/activate.go` - No-op for other platforms
- Called automatically after SDL window creation
### Darwin monitoring script
- Uses macOS native tools: `sysctl`, `vm_stat`, `netstat -ibn`, `iostat`
- Outputs same protocol format as Linux script (M LOADAVG, M MEMSTATS, etc.)
- Limitations: No per-core CPU stats on macOS (iostat limitation)
## Known limitations
- Remote macOS hosts are not supported (assumes all remote hosts are Linux)
- macOS script doesn't provide per-core CPU statistics (iostat limitation)
- Swap usage on macOS always shows 0 (macOS uses compressed memory differently)
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