MacBook Pro (High Sierra) problems at step 3: Installation Type. Only see one partition (dev/sda)

[James_Smith]

I'm currently typing this from my MacBook Pro. I'm running Linux from the USB. It's kind of cool. However, I am stymied. I have followed the instructions here. When I get to the step "Installation Type" I don't see any choices (as I have every time I've installed Linux on a PC). There is no option to erase the OS, install alongside it, or "something else." Worse yet, I don't see the partitions I created so the only thing I can select is dev/sda.

I know those partitions exist because I used the disk utility on MacOs and saw them for myself after I followed Gene's advice (in the link above).

So... what do I do? It seems that I cannot proceed, because when I select "New Partition Table I get a message that says "You have selected an entire device to partition. If you proceed with creating a new partition table on the device, then all current partitions will be removed."

This sounds ominous. Does it mean that macOS will be deleted, or is it just talking about LINUXROOT and LINUXBOOT (the two partitions I created as per the advice in the link above)?

The same dialogue box tells me "Note that you will be able to undo this operation later if you wish" so I'm tempted to do it, but I don't want to without expert advice first.

Also, if I select "Install Now" I get the following message:

No root file system is defined.

Please correct this from the partitioning menu.

I doubt if there are any clues here, but maybe there are...
mint@mint ~ $ inxi -Fxzd
System: Host: mint Kernel: 4.10.0-38-generic x86_64 (64 bit gcc: 5.4.0)
Desktop: Cinnamon 3.6.6 (Gtk 3.18.9-1ubuntu3.3)
Distro: Linux Mint 18.3 Sylvia
Machine: System: Apple (portable) product: MacBookPro14 1 v: 1.0
Mobo: Apple model: Mac-B4831CEBD52A0C4C v: MacBookPro14 1
Bios: Apple v: MBP141.88Z.0169.B00.1712141501 date: 12/14/2017
CPU: Dual core Intel Core i7-7660U (-HT-MCP-) cache: 4096 KB
flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 9984
clock speeds: max: 4000 MHz 1: 699 MHz 2: 699 MHz 3: 698 MHz
4: 699 MHz
Graphics: Card: Intel Device 5926 bus-ID: 00:02.0
Display Server: X.Org 1.18.4 drivers: intel (unloaded: fbdev,vesa)
Resolution: 2560x1600@60.00hz
GLX Renderer: Mesa DRI Intel Kabylake GT3
GLX Version: 3.0 Mesa 17.0.7 Direct Rendering: Yes
Audio: Card Intel Device 9d71 driver: snd_hda_intel bus-ID: 00:1f.3
Sound: Advanced Linux Sound Architecture v: k4.10.0-38-generic
Network: Card: Broadcom BCM4350 802.11ac Wireless Network Adapter
driver: brcmfmac bus-ID: 02:00.0
IF: wlp2s0 state: up mac: <filter>
Drives: HDD Total Size: NA (-)
ID-1: USB /dev/sda model: Cruzer_Glide size: 15.7GB temp: 0C
Optical: No optical drives detected.
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 57.0C mobo: N/A
Fan Speeds (in rpm): cpu: N/A
Info: Processes: 220 Uptime: 31 min Memory: 1497.7/15911.3MB
Init: systemd runlevel: 5 Gcc sys: 5.4.0
Client: Shell (bash 4.3.481) inxi: 2.2.35

Hold on, maybe there is: if you look at Drives, it says USB /dev/sda and then goes on to describe the USB. Does this mean that, for whatever reason, the installer does not see the internal hard drive of the machine and only sees the USB?

[fabien85]

There are issues with support for this hardware, see the following thread : viewtopic.php?f=46&t=262866
Mint 18.3 ships with kernel 4.10 which will not recognise the internal hard drive, as you have found.

There are two options :
- simplest : wait for Mint 19 in May/June
- if you cant wait, you will need to manually put a newer kernel on your live USB, e.g. 4.13 which is available in the repositories.
(this tutorial is supposed to tell you how to do the latter : https://community.linuxmint.com/tutorial/view/1784. I haven't tested it though)