This page explains how to perform a basic set up after installing Linux on a T2 Mac.
Do you need to do this?¶
This guide is mainly relevent in the following cases :-
- If you have installed Linux using an official ISO, instead of a T2 ISO.
- The Make modules load on early boot section is relevant for those who wish to encrypt their disk drives using LUKS or some other similar software.
- If some functionality related to T2 Macs is broken, then you can consider following this guide.
In rest cases, you probably won't need to follow this guide.
Installing a kernel for T2 support¶
Installing a kernel with support for T2 Macs is required in order to get the Keyboard, Trackpad, Touch Bar, Audio, Fan and Wi-Fi working.
Many distro maintainers provide compiled kernels which can be installed on your Linux installation. Following are the links to the repos providing such kernels :-
|Linux Distribution||Kernel with T2 support|
|Arch based distros||https://github.com/Redecorating/linux-t2-arch|
|Arch based distros (Xanmod kernels)||https://github.com/NoaHimesaka1873/linux-xanmod-edge-t2|
|Ubuntu based distros||https://github.com/t2linux/T2-Ubuntu-Kernel|
|Debian based distros||https://github.com/andersfugmann/T2-Debian-Kernel|
If compiled kernels for your distro are not available, then you shall have to compile a kernel on your own. You can follow the Kernel guide for help.
Add necessary kernel paramaters¶
Using your bootloader, add the
intel_iommu=on iommu=pt pcie_ports=compat kernel parameters. For example in GRUB :-
- On the line with
GRUB_CMDLINE_LINUX="quiet splash", add the following kernel parameters:
intel_iommu=on iommu=pt pcie_ports=compat.
sudo grub-mkconfig -o /boot/grub/grub.cfgif you are on a non-debian based distro. If using Debian or Ubuntu based distro, run
Make modules load on boot¶
Simply run the following :-
echo apple-bce | sudo tee /etc/modules-load.d/t2.conf
Make modules load on early boot¶
apple-bce module loaded early allows the use of the keyboard for decrypting encrypted volumes (LUKS).
It also is useful when boot doesn't work, and the keyboard is required for debugging.
To do this, one must ensure the
apple-bce module as well as its dependent modules are included in the initial ram disk.
You can get the list of dependent modules by running
modinfo -F depends apple-bce
The steps to be followed vary depending upon the initramfs module loading mechanism used by your distro. Some examples are given as follows :-
On systems with
initramfs-tools(all debian-based distros) :-
sudo suto open a shell as root.
Run the following over there :-
cat <<EOF >> /etc/initramfs-tools/modules # Required modules for getting the built-in apple keyboard to work: snd snd_pcm apple-bce EOF update-initramfs -u
On systems with mkinitcpio (Commonly used on Arch) :-
Ensure that the file has the following :-
sudo mkinitcpio -P.
On systems with other initramfs/initrd generation systems :-
In this case, refer to the documentation of the same and ensure the kernel module
apple-bceis loaded early.
Setting up the Touch Bar¶
The Touch Bar can be set up by running this script in Linux using
bash /path/to/script. Make sure your Linux kernel and macOS is updated before running this script.
After running this script, if you wish to change the default mode of the Touch Bar, run
sudo touchbar and choose the mode you wish.
In case your Touch Bar is unable to change modes on pressing the fn key, you could try the following :-
- Try adding
usbhid.quirks=0x05ac:0x8302:0x80000as a Kernel Parameter using your Bootloader.
- Try running the following and rebooting.
echo -e "# delay loading of the touchbar driver\ninstall apple-touchbar /bin/sleep 7; /sbin/modprobe --ignore-install apple-touchbar" | sudo tee /etc/modprobe.d/delay-tb.conf >/dev/null
- Boot into the macOS Recovery and then restart into Linux.
- Unplug all the external USB keyboards and mouse and then restart into Linux, keeping them unplugged.
If you still face an issue, mention it here or on the discord.
Copy this script to
If you are using Gentoo with OpenRC, instead copy the script to
Now run :-
sudo chmod 755 /lib/systemd/system-sleep/rmmod_tb.sh sudo chown root:root /lib/systemd/system-sleep/rmmod_tb.sh
Change the path to
/lib64/elogind/system-sleep/rmmod_tb.sh if using OpenRC on Gentoo as mentioned previously.
It unloads the Touchbar modules and reloads them on resume as they can cause issues for suspend.
Wi-Fi and Bluetooth¶
The drivers for Wi-Fi and Bluetooth are included in a kernel with T2 support. But, we also need firmware to get them working from macOS.
Instructions for the same are given in the Wi-Fi and Bluetooth guide.