iMac glacially slow after Mojave upgrade
Hardware Overview:
Model Name: iMac
Model Identifier: iMac14,3
Processor Name: Intel Core i5
Processor Speed: 2.9 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 6 MB
Memory: 8 GB
Boot ROM Version: IM143.0130.B00
SMC Version (system): 2.17f7
Serial Number (system): C**********3
Hardware UUID: E5AB8560-***************
Hard Drive <50% full
Since upgrading to Mojave I have seen the following:
When logging in to a User - black screen for 2 minutes.
Average wait for Safari to open: 62 seconds
Average wait for Word to open: 168 seconds
Average wait for iMovie to open: 387 seconds
Average wait to open Hard Drive icon from desktop: 22 seconds
Average wait form clicking icon in Dock to ANY response (icon bounce): 6 seconds
It has gotten exponentially worse since upgrade.
Any thought re cause or cure?