He podido hacer que funcione en Mavericks al menos cuando se conecta a través del cable USB a Lightning aplicando este parche:
--- /System/Library/Extensions/AppleTopCase.kext/Contents/PlugIns/AppleTopCaseHIDEventDriver.kext/Contents/Info.plist.orig 2017-01-10 20:28:14.000000000 +0100
+++ /System/Library/Extensions/AppleTopCase.kext/Contents/PlugIns/AppleTopCaseHIDEventDriver.kext/Contents/Info.plist 2017-01-10 20:31:55.000000000 +0100
@@ -38,6 +38,38 @@
<string>5A2053</string>
<key>IOKitPersonalities</key>
<dict>
+ <key>Keyboard-Event - 615</key>
+ <dict>
+ <key>CFBundleIdentifier</key>
+ <string>com.apple.driver.AppleHIDKeyboard</string>
+ <key>CapsLockDelay</key>
+ <integer>75</integer>
+ <key>DeviceUsagePairs</key>
+ <array>
+ <dict>
+ <key>DeviceUsage</key>
+ <integer>6</integer>
+ <key>DeviceUsagePage</key>
+ <integer>1</integer>
+ </dict>
+ </array>
+ <key>FnKeyboardUsageMap</key>
+ <string>0x00070050,0x0007004a,0x00070052,0x0007004b,0x0007002a,0x0007004c,0x0007004f,0x0007004d,0x00070051,0x0007004e,0x00070028,0x00070058</string>
+ <key>FnModifierUsage</key>
+ <integer>3</integer>
+ <key>FnModifierUsagePage</key>
+ <integer>255</integer>
+ <key>IOClass</key>
+ <string>AppleHIDKeyboardEventDriverV2</string>
+ <key>IOProviderClass</key>
+ <string>IOHIDInterface</string>
+ <key>NumLockKeyboardUsageMap</key>
+ <string>0x00070029,0x00070029,0x0007002a,0x0007002a,0x0007002b,0x0007002b,0x0007003a,0x0007003a,0x0007003b,0x0007003b,0x0007003c,0x0007003c,0x0007003d,0x0007003d,0x0007003e,0x0007003e,0x0007003f,0x0007003f,0x00070040,0x00070040,0x00070041,0x00070041,0x00070042,0x00070042,0x00070043,0x00070043,0x00070044,0x00070044,0x00070045,0x00070045,0x0007004a,0x0007004a,0x0007004b,0x0007004b,0x0007004c,0x0007004c,0x0007004d,0x0007004d,0x0007004e,0x0007004e,0x0007004f,0x0007004f,0x00070050,0x00070050,0x00070051,0x00070051,0x00070052,0x00070052,0x0007000d,0x00070059,0x0007000e,0x0007005a,0x0007000f,0x0007005b,0x00070018,0x0007005c,0x0007000c,0x0007005d,0x00070012,0x0007005e,0x00070024,0x0007005f,0x00070025,0x00070060,0x00070026,0x00070061,0x00070010,0x00070062,0x00070037,0x00070063,0x00070082,0x00070082,0x000700e0,0x000700e0,0x000700e1,0x000700e1,0x000700e2,0x000700e2,0x000700e3,0x000700e3,0x000700e4,0x000700e4,0x000700e5,0x000700e5,0x000700e6,0x000700e6,0x000700e7,0x000700e7</string>
+ <key>ProductID</key>
+ <integer>615</integer>
+ <key>VendorID</key>
+ <integer>1452</integer>
+ </dict>
<key>Keyboard-Event - 656</key>
<dict>
<key>CFBundleIdentifier</key>
--- /System/Library/Extensions/AppleTopCase.kext/Contents/PlugIns/AppleUSBTopCaseDriver.kext/Contents/Info.plist.orig 2017-01-10 20:27:50.000000000 +0100
+++ /System/Library/Extensions/AppleTopCase.kext/Contents/PlugIns/AppleUSBTopCaseDriver.kext/Contents/Info.plist 2017-01-10 20:44:53.000000000 +0100
@@ -38,6 +38,52 @@
<string>5A2053</string>
<key>IOKitPersonalities</key>
<dict>
+ <key>USBHIDDriver</key>
+ <dict>
+ <key>CFBundleIdentifier</key>
+ <string>com.apple.driver.AppleUSBTopCaseDriver</string>
+ <key>IOClass</key>
+ <string>AppleUSBTopCaseHIDDriver</string>
+ <key>IOProviderClass</key>
+ <string>IOUSBInterface</string>
+ <key>bConfigurationValue</key>
+ <integer>1</integer>
+ <key>bInterfaceNumber</key>
+ <string>*</string>
+ <key>ProductID</key>
+ <integer>615</integer>
+ <key>idVendor</key>
+ <integer>1452</integer>
+ </dict>
+ <key>USBHIDDriver - DM</key>
+ <dict>
+ <key>CFBundleIdentifier</key>
+ <string>com.apple.driver.AppleUSBTopCaseDriver</string>
+ <key>ExtendedData</key>
+ <array>
+ <integer>50399649</integer>
+ <integer>50465185</integer>
+ <integer>50530721</integer>
+ <integer>50596257</integer>
+ <integer>61868449</integer>
+ <integer>61933985</integer>
+ <integer>61999521</integer>
+ <integer>62065057</integer>
+ <integer>62261665</integer>
+ </array>
+ <key>IOClass</key>
+ <string>AppleUSBTopCaseHIDDriver</string>
+ <key>IOProviderClass</key>
+ <string>IOUSBInterface</string>
+ <key>bConfigurationValue</key>
+ <integer>1</integer>
+ <key>bInterfaceNumber</key>
+ <string>0</string>
+ <key>ProductID</key>
+ <integer>615</integer>
+ <key>idVendor</key>
+ <integer>1452</integer>
+ </dict>
<key>AppleTopCase</key>
<dict>
<key>CFBundleIdentifier</key>
así (suponiendo que guardes el parche en un archivo llamado MagicKeyboard.patch
):
sudo sh -c '(cd /; patch -p0) < MagicKeyboard.patch'
y reconstruir la caché de kext usando:
sudo kextcache -f -update-volume /
Después de reiniciar el Magic Keyboard debería ser totalmente funcional cuando se conecta a través del cable.