Since the 10.15.5 Catalina update, file dialogs in my system are extremely slow. It can easily take a couple of minutes to be able to save something to the disk. Never had a similar problem before.
Ran a disk check, made sure that I have free disk space (more than 400GB).
Otherwise, the machine is running smoothly, without any other issues.
Tried googling around and found out that there was a similar issue back with Sierra. Tried to apply the proposed fixes, but to no avail.
In Safe Mode the problem doesn't appear to persist.
Any suggestions would be greatly appreciated!
Machine specs: Mac (Retina 4K, 21.5-inch, 2017), 3,4 GHz Quad-Core Intel Core i5, 8 GB 2400 MHz DDR4, 1TB Fusion Drive.
Update: No finder extensions installed. No OneDrive/Dropbox/anything like that.
kextstat | grep -v com.apple Index Refs Address Size Wired Name (Version) UUID <Linked Against> 102 0 0xffffff7f80f2d000 0x6c4000 0x6c4000 com.realtek.driver.RtWlanU (1830.32.b13) E254FC27-6491-3BC2-BBE8-1B529EA778CD <57 18 6 5 3 1>
Update 2: It takes roughly 90 - 120 seconds to a Save or Open dialog to become active. While it's stuck, the CPU usage by the process gets close to 100%. Doesn't matter the application I'm using - QuickTime, Pages, Microsoft Word, Photoshop or Safari
Update 3: Booted up in the recovery mode and reinstalled Catalina keeping all the computer data. The problem persists
Update 4: Installed BitDefender Trial version in order to make sure there is no malware/virus/whatever on my machine. 90 minutes later - nothing found, but the problem persists.
Update 5: Configured a new administrator account on the Mac. While configuring it, unchecked all iCloud features - the problem doesn't reproduce using that account. Updated the new account with iCloud settings (photos sync, documents sync), the problem doesn't appear.