Slow Start up with High Sierra on Mid 2010 iMac
I have an iMac 21.5 Mid 2010. It was working fine with Mac OS El Capitan. Then I upgraded to Mac OS High Sierra, and start up takes 10+ minutes. Should I /can I, go back to El Capitan? Do I need more memory? What are my options? It looks like Siri was added to the iMac, is it a memory hog? Would it help performance and start up if it were deleted? Thanks for checking this post.
Processor Name: Intel Core i3
Mac OS High sierra 10.13.3
Processor Speed: 3.06 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 4 MB
Memory: 4 GB (Two Empty Slots remaining)
Mac Hard Drive 185.97 GB available of 499.25 GB
Seagate Back up plus drive 962.58 GB available of 1.5 TB
iMac, Mac OS X (10.6.8), 3.06 GHz Intel core i3 4GB 1333 Mhz