UPDATE: I created my own private copy of basic.t and added some stderr debugging statements, then tried running it by hand from the PNG directory. Ran it many times, and it mostly fails with a segmentation fault, but it also will sometimes hang as I said before. Here is an example of when it segfaults: 
$ cd /Users/cmv/.cpan/build/Tk-804.036-0/PNG
$ /opt/homebrew/Cellar/perl/5.36.0/bin/perl -w t/cmv.t
1..5
ok 1 - use Tk::PNG;
Photo 1
zsh: segmentation fault  /opt/homebrew/Cellar/perl/5.36.0/bin/perl -w 
+t/cmv.t

[download]

Here are some relavent lines from my cmv.t file 

...
use_ok('Tk::PNG');

my $file = (@ARGV) ? shift : "$FindBin::RealBin/../pngtest.png";

my $mw = MainWindow->new;
$mw->geometry('+10+10');
$mw->update;            #### Added by --cmv
sleep 10;

{
print STDERR "Photo 1\n";    #### Added by --cmv
    my $image = $mw->Photo('-format' => "png", -file => $file);
print STDERR "Photo 2\n";    #### Added by --cmv
    ok($image, "Loaded PNG image from $file");
print STDERR "Photo 3\n";    #### Added by --cmv
    $mw->Label(-image => $image)->pack;
print STDERR "Photo 4\n";    #### Added by --cmv
    $mw->update;
print STDERR "Photo 5\n";    #### Added by --cmv
}
...

[download]

Note 1: The $mw->update; line does cause the Tk mainwindow to show up on my screen!!!

Note 2: The problem seems to be loading the PNG photo. More digging needed here.

Many thanks to all who have provided pointers and help!

-Craig

In reply to UPDATE: Problem Installing Perl-Tk on macOS Monterey (12.6) with Apple M1 chip by cmv
in thread Problem Installing Perl-Tk on macOS Monterey (12.6) with Apple M1 chip by cmv

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