I just downloaded the latest version of the game for OS X and replaced a previous installation from several years back. On launch I get the message "A serious fault condition occured in the game. The game will be shut down." Here's a copy of the crash report:

*** OpenTTD Crash Report ***

Crash at: Sat Apr 18 13:51:36 2020
In game date: 0-01-01 (0)

Crash reason:
Signal: Segmentation fault: 11 (11)
Message:

OpenTTD version:
Version: 1.10.1 (0)
NewGRF ver: 1a086d64
Bits: 64
Endian: little
Dedicated: no
Build date: Apr 13 2020 19:14:25

Stacktrace:
[00] openttd 0x000000010aa0c6a8 (SelectCompanyLiveryWindow::GroupNameSorter(Group const* const&, Group const* const&) + 68168)

Operating system:
Name: Mac OS X
Release: 10.12.6
Machine: Intel x86-64h Haswell
Min Ver: 1090
Compiler: GCC 4.2.1 "4.2.1 Compatible Apple LLVM 11.0.0 (clang-1100.0.33.17)"

Configuration:
Blitter: 32bpp-anim
Graphics set: none (4294967295)
Language: /private/var/folders/mw/gw7mjttd2y16qyrkblc3xyvm0000gn/T/AppTranslocation/7875D2A8-1171-4A93-820E-9E905255E708/d/OpenTTD.app/Contents/Resources/lang/swedish.lng
Music driver: none
Music set: none (4294967295)
Network: no
Sound driver: none
Sound set: none (4294967295)
Video driver: cocoa

Fonts:
Small: sprite
Medium: sprite
Large: sprite
Mono: sprite

AI Configuration (local: 0) (current: 0):

Libraries:
FreeType: 2.10.1
LZMA: 5.2.5
LZO: 2.10
PNG: 1.6.37
Zlib: 1.2.8

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Recent news messages:

*** End of OpenTTD Crash Report ***