Parallels 15 (Pro) Desktop very slow on iMac Pro

After upgrade PWM from 14 to 15 Excel is very slow and jerky when trying to increase the column size (ID:323646517)
 
Same thing here. With Parallels 15 Excel was barely usable, UI would respond very slowly. Tried different settings, to no avail.
Finally downgraded to v14, now back to normal.
 
Generated report 323787269 for my case. The performance problem really manifests with Excel, though there might be some impact on Word as well (this is more subjective). No other impact.
 
I tried the parallels desktop 15 on the new Catalina, but still it's same. Same lagging scrolls on Excel. Again rolled back to Parallels desktop 14.
 
Same thing here. I installed v15 month ago. Since that my computer started to work very slow with 100% CPU almost all the time. It is true for all apps, especially chrome and Microsoft VS. I have skype installed on my MAC. If I was on skype conversation, especially screen sharing, my windows become 100% CPU immediately and stayed 100% all the time and I was not able to use any app. If skype was turned off, then my windows become 100% CPU as soon as I open few pages of chrome. I tried all possible suggestions to fix the issue - no effect. Finally I gave up and reverted to v 14. Everything now works very smooth and fast without any issues.
 
Finally after months of suffering with slow performance I'm glad that parallels 15.1 update fixed the issue today. :)
 
ChristianS27 said:
Hey guys,

upgraded to Parallels 15 (had 14 Pro before) newest Windows 10 VM running, it was smooth so far.
Now since the Upgrade its running very slow.... especially using Chrome is taking ages to load jcpenney associate kiosk, Edge Browser much faster. General Performance is not that good... what can I do? (

System is:

CPU: Intel Xeon W 3,2 GHz (8 Core) (assigned 16GB of Ram and 8 Cores to Parallels)
RAM: 32GB
Radeon 56
1TB SSD

I can't use it to work with it anymore so far.
Click to expand...
I got problem while using firefox, it takes tons of time to load google, aol.
 
Last edited by a moderator:
One more person with the same issue. Same issue with Excel--it'll lag 1-1.5 seconds if you page up or down. If you're scrolling it may not respond for several seconds. The CPU jumps during this time too (correlated to scrolling.) It's unusable at the moment.
 
Final post on the subject, I promise: downgrading to Parallels 14 fixed the issue completely. After downloading/reinstalling I had to deactivate/reactivate the macbook pro and everything worked fine. It automatically reinstalled parallels tools and I'm back in business.
 
Guys,
we've resolved an issue with slow response in Microsoft Office 365 documents in the newest Parallels Desktop 15 update. (15.1.0)
Please update to the latest build and check the issue.
Let us know how does it work for you.
 
Same problems here. Running 15.1.0. MBP 16gb Catalina host running Windows 10 (8gb/2 cores). Everything is SLOW, I'm a developer running multiple VS instances, Outlook, and Slack. I've disabled everything I can think of to no avail. 14 was great, but this is unusable. Will revert to 14, where it all ran great.
 
MichaelA31 said:
Same problems here. Running 15.1.0. MBP 16gb Catalina host running Windows 10 (8gb/2 cores). Everything is SLOW, I'm a developer running multiple VS instances, Outlook, and Slack. I've disabled everything I can think of to no avail. 14 was great, but this is unusable. Will revert to 14, where it all ran great.
Click to expand...
Following up, reverted to version 14 and all is right in the world again. To reiterate, it was EVERY app running slow for me, not just office.
 
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