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Linux On An Ancient Macbook Pro

Macs never die, sometimes you just wish they would, so you have an excuse to buy a new one.  This Macbook is a 2012 model with Retina display.  So it works very well indeed, but after 14 years, is not supported by Apple anymore.

I put a new battery in it, available from iFixit and now it will once again run all day on battery.  

There is a no nonsense Linux distribution, known as PCLOS, a distribution for Boomers and I guess I qualify!  https://www.pclinuxos.com/

PCLOS has no systemd and no SELinux or AppArmor, so it runs very fast and is excellent for antique machines.  

However, for best results, there are a few things to configure manually on an elderly Macbook Pro.

1. Enable scrolling on the touchpad:

# xinput
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ bcm5974                                   id=11   [slave  pointer  (2)]
⎜   ↳ Genius Optical Mouse                      id=12   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Power Button                              id=8    [slave  keyboard (3)]
    ↳ Sleep Button                              id=9    [slave  keyboard (3)]
    ↳ Apple Inc. Apple Internal Keyboard / Trackpad     id=10   [slave  keyboard (3)]

  # xinput list-props 11
Device 'bcm5974':
        Device Enabled (177):   1
        Coordinate Transformation Matrix (179): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
        Device Accel Profile (313):     1
        Device Accel Constant Deceleration (314):       2.500000
        Device Accel Adaptive Deceleration (315):       1.000000
        Device Accel Velocity Scaling (316):    12.500000
        Synaptics Edges (317):  -3898, 4428, 434, 6146
        Synaptics Finger (318): 70, 75, 0
        Synaptics Tap Time (319):       180
        Synaptics Tap Move (320):       535
        Synaptics Tap Durations (321):  180, 180, 100
        Synaptics ClickPad (322):       1
        Synaptics Middle Button Timeout (323):  0
        Synaptics Two-Finger Pressure (324):    283
        Synaptics Two-Finger Width (325):       7
        Synaptics Scrolling Distance (326):     243, 243
        Synaptics Edge Scrolling (327): 1, 0, 0
        Synaptics Two-Finger Scrolling (328):   0, 0
        Synaptics Move Speed (329):     1.000000, 1.750000, 0.016445, 0.000000
        Synaptics Off (330):    0
        Synaptics Locked Drags (331):   0
        Synaptics Locked Drags Timeout (332):   5000
        Synaptics Tap Action (333):     0, 0, 0, 0, 1, 3, 2
        Synaptics Click Action (334):   1, 3, 2
        Synaptics Circular Scrolling (335):     0
        Synaptics Circular Scrolling Distance (336):    0.100000
        Synaptics Circular Scrolling Trigger (337):     0
        Synaptics Circular Pad (338):   0
        Synaptics Palm Detection (339): 0
        Synaptics Palm Dimensions (340):        10, 200
        Synaptics Coasting Speed (341): 20.000000, 50.000000
        Synaptics Pressure Motion (342):        30, 160
        Synaptics Pressure Motion Factor (343): 1.000000, 1.000000
        Synaptics Grab Event Device (344):      0
        Synaptics Gestures (345):       1
        Synaptics Capabilities (346):   1, 0, 0, 1, 1, 1, 1
        Synaptics Pad Resolution (347): 92, 94
        Synaptics Area (348):   0, 0, 0, 0
        Synaptics Soft Button Areas (349):      0, 0, 0, 0, 0, 0, 0, 0
        Synaptics Noise Cancellation (350):     60, 60
        Device Product ID (305):        1452, 602
        Device Node (304):      "/dev/input/event12"

So, the magic is:
# xinput set-prop bcm5974 "Synaptics Two-Finger Scrolling" 1 1

Put a script in ~/.bashrc or bash_profile.

2. WiFi
The internal WiFi works out of the box, but it may die during an upgrade and then the only fix is to cycle power.
Alternatively, plug in an Edimax USB widget and configure it as WLAN1. If it would ever die, you can just yank it and put it back in.

3. Laptop Mode
Enable laptop-mode when on AC and when the lid closed, otherwise it may not be able to charge the battery. On this machine the battery status indicator bargraph works, but the text always says Fully Charged.

Edit laptop-mode.conf:
# vi /etc/laptop-mode/laptop-mode.conf

#
# Enable laptop mode when on battery power.
#
ENABLE_LAPTOP_MODE_ON_BATTERY=1
#
# Enable laptop mode when on AC power.
#
ENABLE_LAPTOP_MODE_ON_AC=1
#
# Enable laptop mode when the laptop's lid is closed, even when we're on AC
# power? (ACPI-ONLY)
#
ENABLE_LAPTOP_MODE_WHEN_LID_CLOSED=1

4. Set Cmd keys to Control as well as the original Control keys:
System Settings
Keyboard
Keyboard
Click “Key Bindings”
Enable “Configure keyboard options”
Click Alt/Win Key Behaviour
Select Ctrl is mapped to Win keys (and the usual Ctrl keys)
Apply

5. Browsers
The Brave browser works better than the Firefox browser. It is faster and advertisements and pop-ups are blocked very effectively.

Since the Macbook Pro Retina display is very high resolution, the screen print is very tiny by default. Set the minimum display font size to 14 pt and the display zoom level to 150%, for a reasonable text size, or just press "Ctrl +" three or four times.

6. Fan speed control
I have found that the fans run too slow and the machine can overheat, causing your finger tips to feel warm.  If you ignore it, then the machine could suddenly blink a few times and shut down. This is obviously not good and needs a fix.

If you can find it, install mbpfan for automatic fan control on these old Macbooks.

Then edit /etc/mbpfan to set it a little cooler than the default:
low_temp = 50
high_temp = 60
max_temp = 85

Alternatively, set the fan speed manually at the bottom of /etc/rc.d/rc.local to a speed that you can hear, but which is not too noisy:
/bin/echo 1 > /sys/devices/platform/applesmc.768/fan1_manual
/bin/echo 1 > /sys/devices/platform/applesmc.768/fan2_manual
/bin/echo 6000  > /sys/devices/platform/applesmc.768/fan1_output
/bin/echo 6000  > /sys/devices/platform/applesmc.768/fan2_output

AND also add the same lines to the bottom of /etc/acpi/actions/lm_lid.sh

Then, simply let your finger tips tell you whether the machine is running cool enough.

La voila!

Herman
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