I am a QuickBooks Pro Advisor and 99% of my clients use the Windows platform and mostly Desktop which I have have been supporting for over 25 years.   Recently a client of mine purchased QuickBooks Mac Desktop 2021 from me (I am an authorized reseller) and it has been a nightmare her...her MacPro is just 2 years old Model A1989 and when I try to print an invoice for her the deadly colorful circle pops up and and crashes.   Her system also slowed down overall.   Today with a Mac IT guy installing Monterrey operating systems which will take 5 hours +...will this help?