Big Sur Update

[GlennNZ]

Hi all,

Bit the bullet and upgraded development/spare mac mini to Big Sur - enabled fixing iMessage Plugin for support.
Actually seemed to go very well, and old mac seems to run faster...

On to main use Indigo Mac Mini...

Quick Summary:
All good, few minor issues resolved below.

Issues:

Multiple plugins had the developer couldn't be verified prompt.

Matt's answer/fix below, found could run whilst prompt displayed and then reload plugins affected.

From the Terminal try clearing the quarantine bit from the extended file attributes:
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sudo xattr -rd com.apple.quarantine /Library/Application\ Support/Perceptive\ Automation/Indigo\ 7.4/Plugins

You'll need to enter your macOS password for the command to complete.

Nb:
Found Homebridge would not continue despite running above.
Found had to Disable Homebridge. (moving it the Plugins/Disabled folder)
Agree to 'Move to Bin'
Then run above command on Plugins (Disabled) folder as well

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sudo xattr -rd com.apple.quarantine /Library/Application\ Support/Perceptive\ Automation/Indigo\ 7.4/Plugins\ \(Disabled\)

Then restart HomeBridge, Advanced actions rebuild folder.. and at least no erros and says 'Running'
Yet to test full functions...

iMessage Plugin Not authorised to send to Apple
(running new version iMessage Plugin 0.4.7 which fixes Big Sur issue)

Fix:
viewtopic.php?f=297&t=23619#p189420
Save script file, set up to run as indigo action, execute action, agree to check-box .

There-after plugin is allowed to communicate
(Still need Full disk access etc, however that was carried over from previous OSX)

SSL Error with one Plugin

Got this for a unpublished on plugin store (but in github) plugin for communicating with HP iLO Servers (temp/on time etc.)

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  File "/Library/Application Support/Perceptive Automation/Indigo 7.4/Plugins/HPiLO.indigoPlugin/Contents/Server Plugin/hpilo.py", line 406, in _communicate
    sock = self._get_socket()
  File "/Library/Application Support/Perceptive Automation/Indigo 7.4/Plugins/HPiLO.indigoPlugin/Contents/Server Plugin/hpilo.py", line 403, in _get_socket
    raise IloCommunicationError("Cannot establish ssl session with %s:%d: %s" % (self.hostname, self.port, str(exc)))
IloCommunicationError: Cannot establish ssl session with 192.168.1.199:443: [SSL: SSLV3_ALERT_HANDSHAKE_FAILURE] sslv3 alert handshake failure (_ssl.c:727)

Fixed with updating dependencies...

TimeMachine Backups won't complete

Fixed on one mac by using iCleanMac and resetting disk permissions. (something to do with local snapshot...)
Actual error for google was Time Machine could not back up the disk "%@" because a snapshot of the disk could not be created.
Same error on 2nd Mac upgraded (don't really want to install iCleanMac'
Terminal command to do the same (as missing from Disk Utility..)

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sudo diskutil resetUserPermissions / `id -u`

Unfortunately whilst some combo fixed this issue on old Mac,new Mac it persists and cannot complete any time machine backups..

https://discussions.apple.com/thread/252046562


Will report back fixes and any other issues encounter.