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Old 05-21-2013, 03:18 PM
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DetroitT DetroitT is online now
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Join Date: Dec 2000
Location: Detroit, Mi, USA
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Default Re: Impossible to start Pro Tools on MacPro after downgrade Mountain Lion back to LIO

Boot in Lion recover, Verify disk (Repair if errors) then Repair permissions.
Restart.
Clean uninstall of Pro Tools.
If not at 10.7.5 use combo updater to get there.
Install PT's HD 10.3.5
Restart.
Pro Tools will Likely will crash on first try (Registration).
Install latest iLok drivers.
Log out / in
Launch Pro Tools again holding the "n" key which will open playback engine.
Adjust CPU's less 1, Buffer start at 512, Disk cache....Choose HDX / HDN what ever you have.
Come back and let us know how you faired.

T
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APFS 90% 10% Audio on Both.

Pro Tools U-2020.5 macOS 10.14.6 APFS
Second boot-macOS 10.13.6 (Avid HDX-1 Omni)

(2k10MP 5,1 / 64-Gb)
(Sapphire RX-580 MVC-Edition-dual mini 6 pin. one spliced to add Avid mini 4 pin-hdx)
FW-CoreAudio (for poly-recording)
(SSL-HUI-MIDIoverIP)
----
music-design-creation
Post Music-Sound mixing, Production-Enhancements.

Audio Tuning and System Services
new systems builds / upkeep / +
----
New builds:
12 core nMP HDX 1 Slot 5 stock HDX Mac mini 6pin to 4 pin HDX power like 5,1 mp's used)
16 core nMP rack-test station
28 just because machine
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