Currently recommended: (But also see next post below.)

BasiliskII, 1 March 2014 For OSX 10.6 (Snow Leopard) through 10.9 (Mavericks).
Compatible BasiliskIIGUI application (by our member "vasi") and keycodes file included in the download.
Download: http://www.xs4all.nl/~ronaldpr/basilisk ... 140301.zip

Improvements since earlier Intel builds:
- Performance improvements.
- Support for disk images in sparsebundle format. See explanation and discussion in this topic: viewtopic.php?f=20&t=7974
- Cursor grabbing toggle (Ctrl-F5). Pressing Ctrl-F5 will make the emulator grab the mouse cursor and keep it inside its window. Especially useful for some games. Again pressing Ctrl-F5 will release the cursor.
- Window-Fullscreen toggle (Ctrl-Return). Pressing Ctrl-Return will toggle between window mode and full-screen mode.

BasiliskII, 4 October 2009 For PPC and Intel Mac, OSX 10.4 (Tiger) and 10.5 (Leopard).
Compatible BasiliskIIGUI application and keycodes file included in the download.
Download: http://www.xs4all.nl/~ronaldpr/basilisk ... 091004.zip

Specific BasiliskII builds For simplified AppleTalk setup on wired networks. OSX 10.8 and later only. See this forum topic: viewtopic.php?f=6&t=8067
(For the general AppleTalk setup, see linked guide below.)

Additional files:

BasiliskII Disk Image Chooser (with thanks to our member "emendelson")
Selecting and managing disk image files can be done in the volumes list in BasiliskIIGUI, but this AppleScript application is easier to use for that purpose.
Originally introduced in this topic: viewtopic.php?f=6&t=5455
Download: http://www.columbia.edu/~em36/EmulatorD ... hooser.zip

Setup manuals:

This setup manual in E-maculation wiki explains how to set up BasiliskII with System 7.5.3:
Setup manual: http://www.emaculation.com/doku.php/bas ... _osx_setup

This guide describes printing in SheepShaver and BasiliskII:
http://www.emaculation.com/doku.php/she ... k_printing

This guide describes setting up AppleTalk for Basilisk (OS X):
http://www.emaculation.com/doku.php/app ... heepshaver

By posting this last build I hoped to bring some order in all the various BasiliskII builds floating around. But it appears that some games do not run properly in this build. In fact, the games only run fine in builds by vasi and not in builds by Cat_7 and myself. That applies to all builds for at least the past three years.

Current discussion in this topic: viewtopic.php?f=6&t=8297

While I look into this again, here are all the publicly available builds since 2009:

1. Compiled from cebix/macemu source:

October 2009 UB build by me (10.4 and up), with PPC-only GUI included:
http://www.xs4all.nl/~ronaldpr/basilisk ... 091004.zip

October 2011 builds by vasi (10.6 and up, 32-bit):
BasiliskII: https://github.com/downloads/vasi/b2gui ... I-10.6.zip
BasiliskIIGUI: https://github.com/downloads/vasi/b2gui ... I-10.6.zip

March 2013 builds by vasi (10.6 and up, 32-bit, with sparsebundle support):
BasiliskII: https://www.dropbox.com/sh/krq4jq9dsrem ... II.app.zip
BasiliskIIGUI: https://www.dropbox.com/sh/krq4jq9dsrem ... UI.app.zip

March 2014 build by me (10.6 and up, 32-bit, with sparsebundle, cursor grabbing toggle, and window-fullscreen toggle support) now with October 2011 GUI included.
http://www.xs4all.nl/~ronaldpr/basilisk ... 140301.zip


2. Compiled from dsumorok/macemu source:

July 2013 builds by Cat_7 with with special support for simplified AppleTalk setup on wired networks. These builds are for 10.8 and up, are 64-bit, and have sparsebundle, cursor grabbing toggle, window-fullscreen toggle support. See topic: viewtopic.php?f=6&t=8067
Cat_7 notes: These builds do not stem from the official source code repository and will most likely not be updated when the official source code changes.

01-03-2014: Posted the new March 1, 2014 build.
02-03-2014: Replaced the included GUI in the download. (The originally included March 2013 GUI erroneously depends on external X11-related files.)
02-03-2014: Added list of all publicly available builds since 2009.
03-03-2014: Added link to current discussion.
10-08-2016: Removed outdated comment that the 2013 GUI build will only run with X11/XQuartz installed.