12-04-2017
Do you have DOS line terminators <CR> (\r, 0x0D, ^M)? Does "creation of MacOS installation flash media" mean you're running everything on a MacOS? What's your OS and shell versions?
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HATTRIB(1) General Commands Manual HATTRIB(1)
NAME
hattrib - change HFS file or directory attributes
SYNOPSIS
hattrib [-t TYPE] [-c CREA] [-|+i] [-|+l] hfs-path [...]
hattrib -b hfs-path
DESCRIPTION
hattrib permits the alteration of HFS file attributes. In the first form, the MacOS-defined type and creator attributes can be set using
the -t and -c flags, respectively. A file's invisible flag can be set or cleared with +i and -i, respectively. Finally, a file's locked
flag can be set or cleared with +l and -l.
All files mentioned on the command line will receive the specified attributes, regardless of the file's current attributes. Any attribute
not mentioned in the command line is left unchanged.
In the second form, a single HFS pathname refering to a folder is given with the -b option, causing it to become "blessed" as the MacOS
System Folder. For this to be useful, the folder should contain valid Macintosh System and Finder files.
Note that the locked and "blessed" attributes have little consequence to hfsutils.
SEE ALSO
hfsutils(1), hls(1)
FILES
$HOME/.hcwd
AUTHOR
Robert Leslie <rob@mars.org>
HFSUTILS
30-Aug-1998 HATTRIB(1)