As far as number of files scanned, etc? Not really, unfortunately, not in a log that SEP generates.
There is some information in the SEP GUI under Tools > View History, regarding detections made.
There are two additional areas you can check in the OS. Unfortunately, I can't promise you'll find anything there.
1- Messages in Console / All Messages. When a scan launches an entry is written that will include something like "NVsi", looking something like this:
May 2 10:50:01 sandra -n[1798]: Try #0, for , result = 0
May 2 10:50:01 sandra -n[1798]: launch for id = 1 event = NVsi result = 0
I have in the past seen entries written if there was a problem or detection made. I'll paste in some text from a test I did once, as an example:
Scanning...
Archive: /Users/sandra/Desktop/eicarcom2.zip
Compressed File: eicar.com
Scan Result: 1 Infection
Virus Name: EICAR Test String
Repair Attempted: Yes
Repair Result: Deleted
Scanning...
File: /Users/sandra/Desktop/eicarcom2.zip
Scan Result: Contains infected files
Repair Attempted: N/A
Repair Result: All contained files fixed
Scan results:
1 file encountered.
1 file accessible for scanning.
1 archive scanned.
1 archive containing infected files.
1 fully repaired archive.
2 files inside of archives encountered.
2 files inside of archives examined.
1 file inside of archives infected.
Scan started : Fri May 2 10:51:26 2008
Scan finished: Fri May 2 10:51:27 2008
You'll note the date on that is fairly old. This was from SAV for Mac. I have not actually had delve into this since that time.
2- Since a a scheduled scan is essentially a cron job, I have noticed in the past that going into Mail (opening Terminal, typing in the word mail) would show cron-generated mail messages to the local machine with scan results. I became aware of this when a customer complained about emails being sent from Symantec Scheduler, and this was because their username @ machinename was the same as their domain email address (again, it was a cron thing, not a Symantec Scheduler thing). However, I have not seen these in some time either. I don't know if this is due to a change in OS or SEP.
Hope this helps...
sandra