If you are using Notes client 11.0.1 FP5 for Mac OS, pay attention to the new Interim Fix 1.
You can find the fix on Flexnet.
Source: HCL KB LINK
|Fix introduced in release||SPR||Description||Additional Information|
|*MAC Specific* Notes Client 11.0.1 Fix Pack 5 Interim Fix 1 (11.0.1FP5IF1)|
Help > About shows 11.0.1FP5 SHF11 (MAC)
|JADGCC4S36||[Mac] – Monterey – Fixed an issue where Notes memory usage would steadily increase during use. User would sometimes end up with error “Out of Application Memory”.||MAC Specific|