McSink is a text editor and desk accessory for the early Macintosh. It

McSink is a text editor and desk accessory for the early Macintosh. It
was eventually licensed, giving way to the commercial word processor
[Vantage][1].

McSink actually existed alongside Vantage, and was updated from time
to time by its original author as a shareware product, while still
making sure that McSink never surpassed its commercial sibling in
functionality, even going so far as to remove some features along the
way in order to honor the licensing agreement.

McSink is capable of loading "VCMD" files (external command files
written for Vantage, as well as McSink) in order to complete complex
tasks, though only one can be loaded per session in McSink. Depending
on the VCMD that has been run, output is then loaded as a text
document within McSink, which can then be edited and/or saved at the
user's leisure

Included in the first download are the following VCMD files: `ASCII
Codes, Catalog, Compare Files, Copy Icon Grabber, Curly Quotes, Delete
Files, File Munger, Hex Icon Grabber, Join Files, Open Files, Sloppy
Compare, Sloppy Search, Straight Quotes`

DL#1: v7.0A
DL#2: v6.3b
DL#3: v6.1
DL#4: v4.8a (Note: The file in this download named "McSink V4.8
Docs.mw" is actually, despite all appearances, a StuffIt archive. Once
expanded, a second file named "McSink V4.8 Docs.macwrite" is revealed,
which can then be opened normally using MacWrite 5.0.)

Version 7.0A was sourced from [MacGUI][2]. Version 6.3b was sourced
from [Power Users Toolkit 1.0][3]. Version 4.8a was sourced from
[VintageAppleMac.com][4]

Compatibility
Architecture: 68k

To install in System 6, use Font/DA Mover to transfer the desk
accessory from its suitcase to the System file. In SSW 7, simply
remove the McSink DA from its suitcase.

Despite having a unique creator type ("McSk"), McSink documents will
not automatically launch McSink itself, and must be opened manually
from within McSink's embedded File menu. However, documents will gain
their own icon and be openable natively using the helper application
McSink Opener, which was originally provided as a bonus for registered
users of McSink.

[1]: http://macintoshgarden.org/apps/vantage
[2]: https://macgui.com/downloads/?file_id=21290
[3]: http://macintoshgarden.org/apps/power-users-toolkit-putk
[4]: https://www.vintageapplemac.com/software/misc/m/