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Updates the createISO function for Big Sur and notes increased disk requirements for Big Sur.

I tested with Big Sur, and successfully installed the BigSur.iso it produced. I didn't re-test any other macOS releases.

This finishes up the start in #84.

Fixes #85, fixes #80

Comment on lines +29 to +37
echo
echo Create ${isoName} blank ISO image with a Single Partition - Apple Partition Map
echo --------------------------------------------------------------------------
# Just in case - delete any previous sparseimage
[ -e /tmp/${isoName}.sparseimage ] && rm -f /tmp/${isoName}.sparseimage
# increased size to 16G - 8G is too small for Catalina
echo $ hdiutil create -o /tmp/${isoName} -size 16g -layout SPUD -fs HFS+J -type SPARSE
hdiutil create -o /tmp/${isoName} -size 16g -layout SPUD -fs HFS+J -type SPARSE

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Note, this block was just moved up since Big Sur will mount this as the installer image, install_app.

@ansonhoyt ansonhoyt changed the title Bigsur support Fix Big Sur support Jan 1, 2022
@kiding
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kiding commented Feb 3, 2022

A very minor note: Adding "Big Sur" support comments at the top of prepare-iso.sh and README.md would be great.

@NicholasTD07
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Nice man! Thanks for the great work! I was just looking for this.

@jbeard6 jbeard6 mentioned this pull request Mar 14, 2022
@geerlingguy geerlingguy merged commit a243aac into geerlingguy:master Mar 14, 2022
@ansonhoyt ansonhoyt deleted the bigsur-support branch March 23, 2022 17:02
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